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Flashcards in 1st 9 Week Tests Deck (82):
0

What is a system of knowledge and methods used to find that knowledge?

Science

1

How are science and technology related?

Advances in one lead to advances in the other

2

What are some branches of natural science?

Biology, astronomy, chemistry, geology, and physics

3

What happens when data does not support the hypothesis?

The hypothesis is revised

4

What is a physical or mental representation of an object or event?

A model

5

Why are scientific models important?

They help us visualize things that are complex, very large, or very small

6

How do scientists communicate the results of an investigation?

By publishing articles in a scientific journal or by giving talks at scientific conferences

7

An experiment that has only one variable, the independent or manipulated variable, being changed at a time is what kind of experiment?

Controlled experiment

8

What are the two main areas of physical science?

Physics and chemistry

9

What 3 sciences is natural science divided into?

Life science, earth and space science, and physical science

10

What is a statement that summarizes a pattern found in nature?

Scientific law

11

What is an organized plan for gathering, organizing, and communicating information?

Scientific method

12

What is information obtained through the senses?

Observation

13

What is a proposed answer to a question?

Hypothesis

14

What is another name for "manipulated variable"?

Independent variable

15

What is the variable that causes change in another called?

Manipulated (independent) variable

16

What is another name for "responding variable"?

Dependent variable

17

What is the variable that changes in response to the manipulated (independent) variable?

Responding (dependent) variable

18

What is a well tested explanation for a set of observations or experimental results?

Scientific theory

19

What is the study of the composition, structure, properties, and reactions of matter?

Chemistry

20

What is the study of the origin, history, and structure of earth?

Geology

21

What is the study of the universe beyond earth?

Astronomy

22

What is life science called?

Biology

23

What is the study of matter and energy and the interactions between the two forces in motion?

Physics

24

What is the use of knowledge to solve practical problems?

Technology

25

What are the three types of variables in an experiment?

Controlled, manipulated, responding

26

When writing a number in scientific notation, a positive exponents means to move the decimal right or left?

Left

27

When writing a number in scientific notation, a negative exponent means to move the decimal right or left?

Right

28

Why is scientific notation so useful to scientists?

It makes it easier for scientists to work with very large or small numbers

29

What two things do you need to include in a measurement to have it make sense?

Numbers and units

30

What is the formula for density?

Mass
_____
Volume

31

What is a relationship in which the ratio of two variables is constant (one goes up or down at the other does the same)?

Direct proportion

32

What is an instrument that measures temperature?

Thermometer

33

What is a gauge of how exact a measurement is?

Precision

34

What is the closeness of a measurement to the actual value of what is being measured?

Accuracy

35

What are all the digits that are known in a measurement?

Significant figure

36

What is the amount of space taken up by an object?

Volume

37

What is a straight line distance between 2 points?

Length

38

What is quantity of matter in an object?

Mass

39

What is steepness; ratio of vertical change to horizontal change; rise over run?

Slope

40

What is the ratio in which the two variables is constant?

Inverse proportion

41

What is the way of expressing the product of a number between 1-10 and a power of 10?

Scientific notation

42

What is a ratio of equal measurements that is used to convert one unit to another?

Conversion factor

43

What is the ratio of an objects mass to its volume?

Density

44

What is a substance that is made of only one kind of atom?

Element

45

What is a material that contains two or more elements joined in fixed proportions?

Compound

46

What is an example of a mixture?

Sand

47

What is a mixture that appears to contain only one substance?

Homogeneous

48

What is an example of a heterogeneous mixture?

Jar of mixed nuts

49

If you are about to open a container of soy milk and it says to shake well, what is it most likely?

Colloid

50

What is the best use for a bar graph?

Comparing 2 or more things

51

What is the best use for a line graph?

To show changes over time

52

What is the best use for a circle graph?

Show percentages

53

Slope is equal to what?

Rise over run

54

Give an example of something malleable.

Gold

55

Give an example of something with a high viscosity.

Maple syrup

56

What material is malleable and conducts electricity?

Any metal

57

What is the difference between distillation and filtration?

Distillation separates substances based on their boiling point
Filtration separates substances based on their particle size

58

What does an example of a physical change?

Sawing wood in half, cutting hair, heating metal until it's red hot, etc.

59

A substance that easily combines chemically with other substances has a high or low reactivity?

High

60

What is a clue that a chemical change has occurred?

Change in color, formation of a precipitate, production of a gas

61

Why does an element have a fixed composition?

It only has one kind of atom

62

Why does rust form on iron when exposed to air?

They have a high reactivity

63

What is a solid that forms and separates from a liquid mixture ?

Precipitate

64

What are 7 physical properties?

Conductivity, malleability, hardness, melting point, density, viscosity, and boiling point

65

What are two chemical properties?

Reactivity, malleability

66

What type of change (physical or chemical) occurs when mold grows on a strawberry?

Chemical

67

Describe a gas in terms of volume and shape.

No definite (variable) shape
No definite (variable) volume

68

Describe a liquid in terms of volume and shape.

No definite (variable) shape
definite volume

69

Describe a solid in terms of volume and shape.

definite shape
definite volume

70

What is pressure?

The result of a force distributed over an area

71

What affects the pressure of an enclosed gas?

Temperature, volume, and the number of particles

72

If the temperature and volume in a closed container of gas remain constant, and if the number of particles of the gas remains constant, would the gas pressure go up or down?

Increase

73

State Charle's law.

The volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particles is constant

74

If the volume of a cylinder is reduced from 4.0 liters to 2.0 liters, the pressure of the gas in the cylinder will change from 100 kilopascal to what?

200 kilopascal

75

What happens to the temperature of a substance during a phase change?

It stay the same

76

The phase change in which a substance changes from a solid to a liquid is what?

Melting

77

Which phase changes are exothermic?

Freezing, deposition, and condensation

78

Which phase changes are endothermic?

Sublimation, vaporization, and melting

79

What does the kinetic theory state?

All particles of matter are in constant motion

80

Reducing the volume of a gas ___________ it's pressure if the __________ of the gas and the number of particles are constant.

Increases, temperature

81

A graph representing Charle's law shows that the _________ of a gas increases at the same rate as the ________ of the gas.

Temperature, volume