Physical Science - Test 1 Review

Question 1

What is inferring?

Answer 1

Explaining your observations.

Question 2

What is predicting?

Answer 2

To estimate something that will occur in the future or be a consequence of something.

Question 3

What is a quantitative observation?

Answer 3

An observation with numbers.

Question 4

What is a qualitative observation?

Answer 4

Descriptions that does not include numbers.

Question 5

What do physical scientists study?

Answer 5

Chemistry and physics.

Question 6

What does observing involve?

Answer 6

Using all or many senses to gather information on a topic or object.

Question 7

What are the steps to the scientific inquiry?

Answer 7

Posing questions, developing hypotheses, designing experiments, collecting data, interpreting data, drawing conclusions, communicating results.

Question 8

What is matter?

Answer 8

Anything that takes up space and has mass.

Question 9

What is volume?

Answer 9

The amount of space an object or substance takes up.

Question 10

What is density and what is its formula?

Answer 10

The amount of material in a given space. (Density = Mass/Volume

Question 11

Can a hypothesis be proven true?

Answer 11

It cannot be proven true. However, it can be supported or unsupported – or become a theory.

Question 12

What is mass?

Answer 12

How much matter is in an object.

Question 13

Distinguish physical from chemical properties.

Answer 13

A physical property is something we can observe with our senses, opposed to a chemical properties, which tell us how atoms will combine.

Question 14

What makes a hypothesis testable?

Answer 14

A hypothesis is testable if you can form a controlled experiment on that hypothesis.

Question 15

What makes an experiment controlled?

Answer 15

You are only testing for one variable.

Question 16

In the experiment, air temperature and cricket chirps, what is the independent variable? What is the dependent? What makes the experiment controlled?

Answer 16

The independent variable is the air temperature because it is the manipulated variable. The dependent variable is the amount of cricket chirps because it responds to he manipulated variable. The experiment is controlled because you can compare your final results to those of a control group.

Question 17

What should you do if an accident occurs in the lab?

Answer 17

Notify the teacher immediately after or during the accident. If you get a chemical in your eyes, use the eye wash. If your clothes catch fire, stop drop and roll and/or use fire blanket or water.

Question 18

If you cut an apple in half, does the density change?

Answer 18

The density does not change because the mass will be halved and the volume will be halved, leaving the ratio the same as it was originally.

Question 19

How is volume measured with a graduated cylinder?

Answer 19

You fill the graduated cylinder to the appropriate volume, remember that volume, and then submerge the object and subtract the original volume from the new volume.

Question 20

How is mass measured with a triple-beam balance?

Answer 20

Put the object being measured on the pan, then, starting with the largest weight, slide them until the pointer becomes level.

Question 21

How has technology effected scientific research?

Answer 21

EDIT!!

Question 22

Be able to read a thermometer; tell how a thermometer works; what are the units used to report temperature?

Answer 22

A thermometer works because most materials expand when heated. This causes the substance inside to increase, making the substance rise in the tube. Most thermometers one of three common different types of units; Kelvin, Fahrenheit, and Celsius.