Science 1St Nine Weeks Test

Front 1

Steps of the scientific method?

ex)

1.

2.

3.

4.

5.

6.

Back 1

1.state the problem

2.gather information

3.form a hypothesis

4.test hypothesis

5.analyze data

6.draw conclusions

Front 2

what exactly is the scientific method? (not the steps)

Back 2

series of steps in which a question or problem is investigated by observing and experimenting

Front 3

observation:

Back 3

bits of information gathered with the senses

Front 4

inference:

Back 4

conclusion draw from an observation

Front 5

hypothesis:

Back 5

statement that can be tested

Front 6

independent variable:

Back 6

single factor in an experiment that the experimenter changes

Front 7

dependent variable:

Back 7

factor that will be measured in an experiment

Front 8

constant:

Back 8

factor that stays the same through all phases of an experiment

Front 9

control:

Back 9

standard use for comparison in an experiment

Front 10

physical property:

Back 10

characteristics that can be observed using the five senses, without changing or trying to change the composition of the substance

Front 11

chemical property:

Back 11

characteristics that cannot be observe without changing the substance

Front 12

physical change:

Back 12

change in which the form or appearance of matter changes, but not its composition

Front 13

vaporization:

Back 13

liquid to gas

Front 14

condensation:

Back 14

gas to liquid

Front 15

sublimation:

Back 15

solid to gas

Front 16

deposition:

Back 16

gas to solid

Front 17

chemical change:

Back 17

change in which the composition of a substances changes

Front 18

Law of Conservation:

Back 18

states that mass is neither created nor destroyed-and as a result the mass of the substance before a physical or chemical change is equal to the mass of the substance present after the change

Front 19

list five signs of a physical change

ex)

example, example, example, example, example

Back 19

changes color, energy, odor, gases or solids, not easily reversed

Front 20

list 3 signs of a physical change:

ex)

example, example, example

Back 20

shape, state, dissolves

Front 21

list physical properties:

ex)

example, example, example, example

Back 21

density, mass, volume, melting/boiling point, solubility, ability to attract a magnet, state of matter, color

Front 22

substance:

Back 22

matter that has the same fixed composition

Front 23

heterogeneous mixture:

Back 23

not evenly mixed

Front 24

homogeneous mixture:

Back 24

mixed evenly

Front 25

solution

Back 25

another name for homogeneous mixture

Front 26

solute

Back 26

substance that dissolves

Front 27

solvent

Back 27

dissolves the solute

Front 28

precipitate

Back 28

result of a chemical change

Front 29

aqueous

Back 29

solution where water is the solvent

Front 30

acid

Back 30

substance that release positively charged ions

Front 31

base

Back 31

substance that accepts hydrogen ions

Front 32

pH

Back 32

measurement of how acidic or basic things are

Front 33

neutralization

Back 33

reaction of acid plus base

Front 34

what is this and what does it mean?

Back 34

ph scale, measures how acidic or basic things are.

Front 35

what is most likely the ph of water?

a) ph 2

b) ph 7

c) ph 14

d) ph 8

Back 35

ph 7

Front 36

what is most likely the ph of hand soap?

a) ph 3

b) ph 9

c) ph 14

d) ph 10

Back 36

ph 10

Front 37

what is 7 on the ph scale?

Back 37

neutral

Front 38

list 5 homogeneous mixtures

Back 38

shampoo, sugar and water, frozen pop, koolaid, soap and water.

Front 39

list 5 heterogeneous mixtures

Back 39

salad, watermelon, backpack, strawberry, tomato

Front 40

displacement?

Back 40

distance and direction between starting and ending point

Front 41

speed?

Back 41

distance divided by time

Front 42

velocity?

Back 42

displacement divided by time

Front 43

acceleration?

Back 43

change in velocity divided by the time it took

Front 44

formula for speed?

Back 44

d/t

Front 45

force?

Back 45

push or pull

Front 46

Newton's first law of motion?

Back 46

object will stay at rest unless acted upon by an unbalanced force.

Front 47

what does this represent?

Back 47

balanced forces

Front 48

what does this represent?

Back 48

unbalanced forces

Front 49

Newtons second law

Back 49

if you push something with force then that thing will go in the direction of that force

Front 50

friction

Back 50

force that resists sliding

Front 51

newtons 3rd law

Back 51

forces act in equal but opposite pairs