1 What is the scientific method? Steps scientists use to answer questions and solve problems.

1

What is the scientific method?

Steps scientists use to answer questions and

solve problems.

2

What is the first step of the Scientific Process?

Ask a question or identify the problem

3

After you have asked the question, you are ready

to…

Form a hypothesis

4

Is it ok if your results do not support your

hypothesis?

YES

5

What should you do if your results do not

support your hypothesis?

Repeat investigation and change hypothesis if

necessary

6

What is the importance of the International System

of Units (SI)?

It is the oldest and most widely used system

7

What are the SI units for measuring LENGTH,

MASS, and VOLUME?

Meter, Kilogram, and Liter

8

What happens to a solid object with a density that is less than

water when it is placed in water?

It floats on top of the water

9

Is the explosion of fireworks is an example of a PHYSICAL

or CHEMICAL change?

Chemical change

10

Is grounding/grinding flour an examples of PHYSICAL

or CHEMICAL change?

Physical Change

11

What has mass and takes up space?

MATTER

12

What change of state happens if you open a bottle of perfume

after a period of time?

Evaporation

13

What is the melting point of ice the same as?

The freezing point of water

14

Will a liter of water boil at the same temperature as

a milliliter of water?

YES!

15

What change of state is solid to gas?

Sublimation

16

What change of state is EVAPORATION?

Liquid to gas

17

What change of state is liquid to gas?

CONDENSATION

18

What change of state is MELTING?

Solid to Liquid

19

Are boiling point, melting point and density examples of

physical or chemical properties?

PHYSICAL

20

What is a pure substance made of two or more elements that

are CHEMICALLY combined?

COMPOUND

21

Is FLAMMABILITY an example of a physical or

chemical property?

CHEMICAL PROPERTY

22

When elements form mixtures, do the elements keep their properties or form a new

substance?

KEEP their same properties

23

Which is NOT an method of separating a mixture of solids:

filtering, screening, evaporation?

EVAPORATION

24

What is the smallest particle in which an element can be divided and still be

the same substance?

ATOM

25

Which of the following has a POSITIVE charge:

proton, neutron, electron?

PROTON

26

Which of the following has a NEGATIVE charge:

proton, neutron, electron?

ELECTRON

27

Which of the following has a NEUTRAL charge:

proton, neutron, electron?

NEUTRON

28

Where is the nucleus of an atom and what does it

contain?

Center and hold the protons and neutrons

29

What is the type of change when a new substance is

formed with different properties?

CHEMICAL CHANGE

30

With a hair dryer, electrical energy is changed into

which type of energy: light, nuclear, thermal, chemical?

THERMAL

31

When you eat fruits and vegetables, what type of energy

are you taking in: thermal, sound, chemical, electrical?

CHEMICAL ENERGY

32

When is POTENTIAL ENERGY the greatest in

a roller coaster?

At the top of the first hill

33

What is THE ABILITY TO DO WORK called?

ENERGY

34

Conduction, convection, or radiation: when the end of a spoon in hot soup gets warm.

CONDUCTION

35

Conduction, convection, or radiation: when water boils in a pot, the water

moves in circular patterns?

CONVECTION

36

Conduction, convection, or radiation: when the coils of a portable heater warm a room?

RADIATION

37

Particles move fast, slide past one another.

LIQUIDS

38

Particles move very fast independent of each other,

bumping into each other wildly.

GAS

39

Particles are attracted to each other and vibrate in

place close together.

SOLID

40

Why are protons and electrons attracted to each other?

Protons have a positive charge and electrons have a negative charge…opposites

attract!

41

What do you see by sprinkling iron filings around a magnet?

Magnetic field lines

42

WHAT can be measured by counting how many waves pass by in a certain amount

of time: frequency, wavelength, or wave speed?

FREQUENCY

43

WHAT is the distance from any point on a wave to an identical point of the next

wave: frequency, wavelength, wave speed?

WAVELENGTH

44

WHAT is the speed at which a wave travels through a

medium: frequency, wavelength, wave speed?

WAVE SPEED

45

The SPEED of a sound wave depends on what?

The substance through which it travels: the

medium

46

WHITE LIGHT is the entire range of what?

All the colors of visible light combined together

47

Which results in a helpful INCREASE of friction:

sandpaper on wood, wax on skis, sand on an icy sidewalk?

Sand on an icy sidewalk

48

Which results in a helpful DECREASE of friction: force applied while scrubbing, oil added to a car engine, deep tread added to snow tires?

Oil added to a car engine

49

What illustrates MOTION by relating it to a reference point: hands of a clock relative to the

numbers, the distance a race car travels, the velocity of a train?

The hands of a clock

50

What are two factors used to determine the formula for speed: acceleration, velocity, distance, time, motion, reference point?

DISTANCE and TIME

51

Explain the difference between speed and

velocity.

One has direction

52

To produce a change in motion, a force must be

WHAT?

UNBALANCED FORCE