Learning Standard 1 Test ( Science )

Question 1

Name the three Variables in an experiment

Answer 1

• Independent Variables
• Dependadnt Variables
• Controlled Variables.

Question 2

What is an Independant Variable?

Answer 2

A Variable you can change or manipulate

Question 3

What is a Dependant Variable?

Answer 3

a Variable that is affected by your independent variable.

Question 4

What is a Controlled Varible?

Answer 4

Variables that stay the same throughout the experiment.

Question 5

if the arrows on a target are in a group but are not near the bullsizy is that accurate or pursise?

Answer 5

Accurate

Question 6

If the arrows are all on the bullsiy, is that accurate or purses?

Answer 6

Both

Question 7

if the arrows are all close to the bullsy but not on it, is that accurate or pursise?

Answer 7

Persise

Question 8

what are the 2 properties of matter?

Answer 8

-Qualitative
-Quanititaive

Question 9

What does Qualitative mean?

Answer 9

Measures using instruments such as a ruler. Measures in #’s

Question 10

What does Quanlitative mean?

Answer 10

Information that cant be meaused, Uses your senses.
Sight, hears, smell, taste, touch.

Question 11

What is the Percent Error formula?

Answer 11

Eperimental value - accepted value / accepted value x 100

Question 12

what is this percent error?
a student finds the density of a liquid to be 0.1369g/cm3 the known density of the liquid is 0.1478g/cm3

Answer 12

0.1369 - 0.1478 / 0.1478 x 100 = - 7.378%

Question 13

How many significant figures does this number have?
0.0000482

Answer 13

3

Question 14

How many signifigant figures does this number have?
3.00 x 10cubed3

Answer 14

3

Question 15

How many signifigant figures does this number have?
122.000

Answer 15

6

Question 16

What is the answer to this signifigant figure equation?
36.0 x 5.0

Answer 16

18 g/cm3

Question 17

What is the answer to this signifigant figure equation?
3.22 + 2

Answer 17

5 g/cm3

Question 18

What are the two claffsifications of a pure substance?

Answer 18

-Element
- Compound

Question 19

what are the two clasifications of a mixture?

Answer 19

• Homogeneous (solution)
  -Heterogeneous

Question 20

How would you classify H2O2?

Answer 20

Pure substance, Compound

Question 21

How woulud you classify Hot tea?

Answer 21

Homogeneous Solution

Question 22

How would you classify Rasian Bran?

Answer 22

Heterogeneous Substnace

Question 23

How would you classify Neon?

Answer 23

Pure Substance, Element

Question 24

What is the definition of matter

Answer 24

Anything with mass and takes up space

Question 25

What are Physical Properties?

Answer 25

They can be observed or measured without changing the identity of the substance. Ex.) Texture, color, smell, melting point, boiling point, density.

Question 26

What are Chemical Properties?

Answer 26

Describes a substance's ability to change and transform into a different substance. Ex.) Flammability, reactivity, ability to rust

Question 27

Is Digesting food a chemical or a physical change?

Answer 27

Chemical

Question 28

Is rusting metel a chemical or physical change?

Answer 28

Chemical

Question 29

Is melting ice a physical or chemical change?

Answer 29

Physical

Question 30

Is chopping wood a physical or chemical change?

Answer 30

Physical