Tables and Graphs
Directions: Match the information in Column I with the best way to display it from Column II. Write the letter of the correct term in the blank at the left. A letter may be used more than once.
Column I
Column II
a. bar graph b. circle graph c. line graph d. table
_____ 1. amount of rainfall in an area each month for a year_____
2. how the constellations change position over several hours_____
3. percents of the most abundant metals in Earth's crust_____
4. percents of the different gases in the atmosphere on Mars_____
5. daily high and low tide times for a week_____
6. how a sound wave travels through the air
Directions: Use the paragraph below to complete question 7.
Some animals can live much longer than others. For example, both the golden eagle and the blue whale have a maximum life span of more than 80 years, while a guppy's maximum life span is only five years. A giant spider may live 20 years, a lobster 50 years, and a crocodile may live 60 years.
Make a chart and draw a graph to display the data given in the paragraph.
What is science?
Directions: List the steps that are usually followed in scientific methods.
What does SI stand for?
Directions: Match each unit with what it measures by writing the correct letter in the space provided.
_____ 9. meter
a. length
_____ 10. liter
b. mass
_____ 11. kilogram
c. volume
Directions: Answer the following questions on the lines provided.
Suppose a scientist wants to test a new drug to fight the flu. The scientist injects the drug into three people with the flu. The scientist injects a harmless solution into three other people with the flu. In this experiment, what is the variable group and what is the control group?
Why is it necessary to follow safety rules in the science laboratory?
What is the difference between a theory and a scientific law?
Thursday, September 27, 2007
6th Grade Reveiw test
This is NOT the test, but only a practice guide to help students identify areas that need more study time. The questions below are not on the TEST and do not cover ALL topics on the test.
Measurement
I. Testing Concepts
Directions: completes each statement or answers the question.
1. A pitcher holds 1.725 L. What is the capacity of the pitcher to the nearest liter?
2. Which unit would you use to measure the length of a mailbox?
3. The temperature on a spring day is 18°C. To the nearest whole number, what is the temperature in kelvins?
4. A scale is marked in tenths of a kilogram. To what precision can the mass of a bag of apples be measured?
5. Which of the following is NOT a measurement?
6. Which multiplier would you use to convert 1.9 km to meters?
7 Which unit would you use to measure the distance from Dallas, Texas, to Memphis, Tennessee?
8. Suppose you traveled to Mars. Compare your weight and your mass on Mars to your weight and mass on Earth.
a. Both your weight and mass would remain the same.b. Your weight would remain the same, your mass would change.c. Your weight would change, your mass would remain the same.d. Both your weight and your mass would change.
9. A digital thermometer shows the temperature as 21.2°C. The thermometer is precise to the nearest ______.
10. What property of an object is measured in grams?
11. A section of a circle graph measures 180°. What percent of a circle graph is this section?
12. What unit would you use to measure the area of a carpet?
13. Which graph would best show what percent of your class wears glasses?
14. Data in a table is organized ______.
15. What unit would you use to measure the length of a carpet?
16. Which is a reasonable estimate of the length around your wrist?
17. Which is the symbol for the SI unit of temperature?
18. How would you calculate the angle to show 20% in a circle graph?
19. Which is NOT an SI unit?
II. Understanding Concepts
Skill: Making and Using a Table
Create a Circle graph using the below numbers
1. Adult females
15
2. Adult males
12
3. Juvenile females
18
4. Juvenile males
15
Skill: Graphing
Use the angles from the table and your estimation skills to sketch a circle graph.
Suppose you want to graph the number of each type of sparrow. What kind of graph would you use?
III. Applying Concepts
Directions: Answer the following questions.
Explain how you would round 2.625 m to the nearest tenth of a meter.
How many centimeter cubes can be shipped in this box?
List these masses in order from greatest to least: 6471 mg, 9 kg, 76 mg, 422 g.
IV. Writing Skills
Directions: Answer the following questions using complete sentences.
How could you estimate a cat's length if you did not have a ruler?
Jenny says she can identify an SI base unit because a base unit does not contain a prefix. Is she right?
Measurement
I. Testing Concepts
Directions: completes each statement or answers the question.
1. A pitcher holds 1.725 L. What is the capacity of the pitcher to the nearest liter?
2. Which unit would you use to measure the length of a mailbox?
3. The temperature on a spring day is 18°C. To the nearest whole number, what is the temperature in kelvins?
4. A scale is marked in tenths of a kilogram. To what precision can the mass of a bag of apples be measured?
5. Which of the following is NOT a measurement?
6. Which multiplier would you use to convert 1.9 km to meters?
7 Which unit would you use to measure the distance from Dallas, Texas, to Memphis, Tennessee?
8. Suppose you traveled to Mars. Compare your weight and your mass on Mars to your weight and mass on Earth.
a. Both your weight and mass would remain the same.b. Your weight would remain the same, your mass would change.c. Your weight would change, your mass would remain the same.d. Both your weight and your mass would change.
9. A digital thermometer shows the temperature as 21.2°C. The thermometer is precise to the nearest ______.
10. What property of an object is measured in grams?
11. A section of a circle graph measures 180°. What percent of a circle graph is this section?
12. What unit would you use to measure the area of a carpet?
13. Which graph would best show what percent of your class wears glasses?
14. Data in a table is organized ______.
15. What unit would you use to measure the length of a carpet?
16. Which is a reasonable estimate of the length around your wrist?
17. Which is the symbol for the SI unit of temperature?
18. How would you calculate the angle to show 20% in a circle graph?
19. Which is NOT an SI unit?
II. Understanding Concepts
Skill: Making and Using a Table
Create a Circle graph using the below numbers
1. Adult females
15
2. Adult males
12
3. Juvenile females
18
4. Juvenile males
15
Skill: Graphing
Use the angles from the table and your estimation skills to sketch a circle graph.
Suppose you want to graph the number of each type of sparrow. What kind of graph would you use?
III. Applying Concepts
Directions: Answer the following questions.
Explain how you would round 2.625 m to the nearest tenth of a meter.
How many centimeter cubes can be shipped in this box?
List these masses in order from greatest to least: 6471 mg, 9 kg, 76 mg, 422 g.
IV. Writing Skills
Directions: Answer the following questions using complete sentences.
How could you estimate a cat's length if you did not have a ruler?
Jenny says she can identify an SI base unit because a base unit does not contain a prefix. Is she right?
Wednesday, September 26, 2007
7th Grade - Chapter 3 Practice Test
This Practice test is solely to aid students. These are not the actual test questions but simialr questions that will help the students practice.
Inside the Atom
I. Testing Concepts
Directions: For each of the following, complete the sentence.
1. ______ contain(s) only one kind of atom.
2. A(n) ______ is the basic unit of matter.
3. Particles in an atom's nucleus that do not have an electric charge are called ______.
4. The atomic mass of an atom consists of the mass of the ______.
5. In an atom, the electrons can be found in the ______.
6. J. J. Thomson used the fact that ______ charges attract each other in his cathode-ray tube experiment.
7. The mass number of an isotope is the number of ______.
8. Isotopes are atoms of the same element that have a different number of ______.
9. To find the number of neutrons in an isotope, subtract the______.
a. atomic number from the mass numberb. mass number from the atomic numberc. number of isotopes from the mass numberd. number of protons from the number of electrons
_______ 10. The most stable isotope of an atom with 12 protons probably has ______ neutrons.
11. The strong nuclear force holds the ______ together.
12. Radioactive decay is the release of ______.
13. A(n) ______ particle consists of two protons and two neutrons.
14. The changing of one element into another in radioactive decay is called ______.
15. Radioactive decay can be affected by ______.
16. A radioactive isotope has a half-life of 100 years. A sample of 40 g of the isotope will have a mass of ______ g in 200 years.
17. Tracer elements can be used without danger to people because they have ______ halflives.
Directions: Identify each statement as true or false. Rewrite false statements to make them correct.
18. A proton is a positively charged particle present in the nucleus of all atoms.
19. The mass of a proton is much greater than the mass of a neutron.
20. Atoms of the same element can have a different number of neutrons.
21. Dalton believed that the atom was a hard sphere that was the same throughout.
22. J. J. Thomson did experiments that showed that atoms cannot be divided into smaller particles.
23. Rutherford's experiment showed that alpha particles could pass through foil because most of an atom is neutrally charged.
24. The strong nuclear force can hold the protons of an atom together only if the protons are far apart.
25. Once a living organism dies, the amount of carbon-14 cannot be replaced.
II. Understanding Concepts
Skill: Outlining
Directions: Answer the following questions on the lines provided.
In an outline, the subtopics are neutron, proton, and electron. What is the main topic?
In an outline, the subtopics are fossil dating, cancer detection, and circulation problems. What is the main topic?
III. Applying Concepts
Directions: Do the following calculation. Show your work in the space provided.
An atom has a mass number of 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.
The isotopes of carbon (carbon-12, carbon-13, and carbon-14) have different mass numbers. Each isotope has six protons. Explain how you can determine the number of neutrons in each isotope.
A certain element has a half-life of 20 years. A scientist starts with 100 g of the element.
How many grams remain after 20 years?
How many grams remain after 40 years?
How many half-lives are there in a 100-year span? How many grams of the sample would remain at the end of the 100 years?
IV. Writing Skills
Directions: Answer the following question in complete sentences.
How is americium-241 used in smoke detectors?
Inside the Atom
I. Testing Concepts
Directions: For each of the following, complete the sentence.
1. ______ contain(s) only one kind of atom.
2. A(n) ______ is the basic unit of matter.
3. Particles in an atom's nucleus that do not have an electric charge are called ______.
4. The atomic mass of an atom consists of the mass of the ______.
5. In an atom, the electrons can be found in the ______.
6. J. J. Thomson used the fact that ______ charges attract each other in his cathode-ray tube experiment.
7. The mass number of an isotope is the number of ______.
8. Isotopes are atoms of the same element that have a different number of ______.
9. To find the number of neutrons in an isotope, subtract the______.
a. atomic number from the mass numberb. mass number from the atomic numberc. number of isotopes from the mass numberd. number of protons from the number of electrons
_______ 10. The most stable isotope of an atom with 12 protons probably has ______ neutrons.
11. The strong nuclear force holds the ______ together.
12. Radioactive decay is the release of ______.
13. A(n) ______ particle consists of two protons and two neutrons.
14. The changing of one element into another in radioactive decay is called ______.
15. Radioactive decay can be affected by ______.
16. A radioactive isotope has a half-life of 100 years. A sample of 40 g of the isotope will have a mass of ______ g in 200 years.
17. Tracer elements can be used without danger to people because they have ______ halflives.
Directions: Identify each statement as true or false. Rewrite false statements to make them correct.
18. A proton is a positively charged particle present in the nucleus of all atoms.
19. The mass of a proton is much greater than the mass of a neutron.
20. Atoms of the same element can have a different number of neutrons.
21. Dalton believed that the atom was a hard sphere that was the same throughout.
22. J. J. Thomson did experiments that showed that atoms cannot be divided into smaller particles.
23. Rutherford's experiment showed that alpha particles could pass through foil because most of an atom is neutrally charged.
24. The strong nuclear force can hold the protons of an atom together only if the protons are far apart.
25. Once a living organism dies, the amount of carbon-14 cannot be replaced.
II. Understanding Concepts
Skill: Outlining
Directions: Answer the following questions on the lines provided.
In an outline, the subtopics are neutron, proton, and electron. What is the main topic?
In an outline, the subtopics are fossil dating, cancer detection, and circulation problems. What is the main topic?
III. Applying Concepts
Directions: Do the following calculation. Show your work in the space provided.
An atom has a mass number of 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.
The isotopes of carbon (carbon-12, carbon-13, and carbon-14) have different mass numbers. Each isotope has six protons. Explain how you can determine the number of neutrons in each isotope.
A certain element has a half-life of 20 years. A scientist starts with 100 g of the element.
How many grams remain after 20 years?
How many grams remain after 40 years?
How many half-lives are there in a 100-year span? How many grams of the sample would remain at the end of the 100 years?
IV. Writing Skills
Directions: Answer the following question in complete sentences.
How is americium-241 used in smoke detectors?
7th Grade - Chapter 3 Study Sheet
This sheet does not contain all items on the test. It is just a quick review sheet that should help you target in on the areas you need to study more.
The Nucleus
Directions: Answer the following questions on the lines provided.
What does the atomic number of an element refer to?
Define isotopes. ________________________________________________________________
What is the strong nuclear force? __________________________________________________
Name two types of transmutations. _________________________________________________
Explain what happens during transmutation. __________________________________________
What is radioactive decay?
Describe an alpha particle.
Describe a beta particle.
What is meant by the half-life of a radioactive isotope?
Why are nuclear waste products a problem?
Why are tracer elements important?
Directions: Identify each statement as true or false. Rewrite the false statements to make them correct.
Radioactive isotopes used for medical purposes should have long half-lives.
Scientists can use particle accelerators to create new elements.
Archaeologists can estimate the age of any ancient artifact with carbon dating.
The half-life of a radioactive isotope decreases as the isotope decays.
The Nucleus
Directions: Answer the following questions on the lines provided.
What does the atomic number of an element refer to?
Define isotopes. ________________________________________________________________
What is the strong nuclear force? __________________________________________________
Name two types of transmutations. _________________________________________________
Explain what happens during transmutation. __________________________________________
What is radioactive decay?
Describe an alpha particle.
Describe a beta particle.
What is meant by the half-life of a radioactive isotope?
Why are nuclear waste products a problem?
Why are tracer elements important?
Directions: Identify each statement as true or false. Rewrite the false statements to make them correct.
Radioactive isotopes used for medical purposes should have long half-lives.
Scientists can use particle accelerators to create new elements.
Archaeologists can estimate the age of any ancient artifact with carbon dating.
The half-life of a radioactive isotope decreases as the isotope decays.
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