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CBA 1 Review

Total questions: 63

Worksheet time: 33mins

Name
Class
Date
1.
Is a a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
2.
Is spoiling food a physical or chemical change?
a)
phyiscal
b)
chemical
3.
Is frying an egg a physical or chemical change?
a)
chemical
b)
physical
4.
Is a a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
5.
what is the definition of physical change?
a)
any change that results in the formation of new chemical substances. 
b)
rusting
c)

changes affecting the form of a chemical substance, but not its chemical identity.

d)
any property that is measurable, whose value describes a state of a physical system
6.

What is a chemical change?

a)

How two chemicals react with one another when combined

b)

A property that we can measure or observe with our 5 senses or other tools

c)

When two chemicals react with one another to form a new substance

d)

When a change occurs but it does not result in the formation of a new substance

7.

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?

a)

The powder DISSOLVED in the water

b)

The water turned the COLOR yellow

c)

The bag's TEMPERATURE changed

d)

The STATE OF MATTER changed

8.

Which of the following examples provides evidence of a PHYSICAL change?

a)

Wood is burned and releases ash and smoke

b)

Iron rusts over time

c)

When mixed, baking soda and vinegar form gas bubbles

d)

Boiling water bubbles when heated

9.

Which of the following options provides evidence of a CHEMICAL change?

a)

Wood is burned releasing ash and smoke

b)

Rocks separate when soil is sifted

c)

Boiling water bubbles when heated

d)

Salt dissolves in water

10.

Which observations prove a chemical change occurred ?

a)

Dissolving and expected color change

b)

Mixing and dissolving

c)

State of matter change and boiling water bubbles

d)

Unexpected color change and temperature change

11.

When mixing milk and vinegar, a white, chunky, solid substance is formed. What has occurred?

a)

Physical change: state of matter

b)

Chemical change: precipitate

c)

Physical change: freezing

d)

Chemical change: rust

12.

You mix two liquids together, bubbles form and the temperature decreases. This is a....

a)

Endothermic chemical change

b)

Exothermic chemical change

c)

Physical Change

13.

You mix a red liquid and a white solid together. They turn yellow and the temperature increases. This is a...

a)

Endothermic chemical change

b)

Exothermic chemical change

c)

Physical Change

14.

You mix a yellow powder and a clear liquid. The liquid turns light yellow and the powder seems to disappear. This is a...

a)

Endothermic Chemical Change

b)

Exothermic Chemical Change

c)

Physical Change

15.
In physical changes, substances might change in __________ but not in __________.
a)
appearance, composition
b)
volume, state of matter
c)
texture, color
d)
weight, mass
16.
True or False: a physical change may produce a new substance.
a)
True
b)
False
17.
Which of the following is an example of a precipitate?
a)
liquid evaporating into gas
b)
a solid formed from a frozen liquid
c)
a chunk solid formed from two liquids combining
d)
a liquid solution that contains two substances
18.
Which of the following is an example of a physical change?
a)
sugar and oxygen reacting to produce water and carbon dioxide
b)
honey dissolving in tea
c)
a raw egg being cooked
d)
metal rusting after being left out in the rain
19.
A physical change can sometimes result in a color change. Which of the following situations show this?
a)
Milk turns yellow when it spoils.
b)
Dough becomes darker when it is baked into cake.
c)
A red candy dissolves and turns water pink.
d)
A match turns black when it is burned.
20.
Bubbles form when two or more substances are combined ...
a)
Chemical Change
b)
Physical Change
21.
A change in which NEW substances are formed.
a)
Chemical change
b)
Physical change
c)
Casual change
d)
Formal change
22.

Choose the best description below for the image

a)

physical change

b)

chemical change

23.

Choose the best description below for the image

a)

physical change

b)

chemical change

24.

Choose the best description below for the image

a)

physical change

b)

chemical change

25.

Choose the best description below for the image

a)

physical change

b)

chemical change

26.

Choose the best description below for the image

a)

physical change

b)

chemical change

27.

Choose the best description below for the image

a)

physical change

b)

chemical change

28.

The image is best described as

a)

Chemical Change

b)

Physical Change

29.

When silver metal comes in contact with sulfur, silver sulfide forms and the silver appears darker. This is a...

a)

 change of form

b)

chemical change

c)

 change of state

d)

physical change

30.

Two solutions are added together and the new solution becomes hot. This tells you that

a)

a gas is being produced.

b)

the solutions are not soluble. 

c)

the physical properties are the same.

d)

a chemical change is taking place.

31.

A solid brown metal is added to a clear acidic solution. A white powder appears and the acid solution becomes cloudy. Which type(s) of change have/has occurred?

a)

both chemical and physical

b)

only physical

c)

 neither chemical nor physical

d)

only chemical

32.
The stomach releases hydrochloric acid and enzymes that break down the protein in meats and turn the protein into amino acids. This change is
a)
Physical
b)
Chemical
33.

Which type of digestion breaks food into smaller pieces?

a)

mechanical

b)

chemical

34.
The mouth digests (breaks down) _________ by chewing.
a)
mechanically
b)
chemically
c)
elimination
d)
absorption
35.

Many processes occur in the digestive system. Which process is best classified as a chemical change?

a)

Teeth grinding candy

b)

Absorption of water

c)

Enzymes in the saliva

d)

Peristalsis in the esophagus

36.

Which way of preparing food models a physical change that happens to food within the digestive system?

a)

Grinding fruit in a blender

b)

Frying an egg in a skillet

c)

Burning a marshmallow over a flame

d)

Freezing juice in an ice-pop mold

37.

Which of the following best identifies a physical digestive process?

a)

acid secretion

b)

enzyme action

c)

peristalsis

d)

heat formation

38.
Where do chemical changes NOT occur in your digestive system?
a)
mouth
b)
esophagus
c)
stomach
d)
small & large intestine
39.
Why can't astronauts go to Mars yet?
a)
Scientist don't know how to get them there safely and ho to get them back safely 
b)
Mars is too far away
c)
Mars doesn't have food 
d)
Scientists haven't learned the Martian language yet 
40.
How are Mars and Earth similar? 
a)
A day is about the same length
b)
Both have a metallic core and rocky outer crust.
c)
Both have ice caps that form at the poles.  
d)
All options are true.
41.
Which of the following is the strongest reason for Earth being habitable?
a)
The Earth is close enough to the Sun to have a night and day.
b)
The atmosphere of Earth has a favorable ratio of gases.
c)
The Earth is far enough from the Sun to be protected from radiation.
d)
The atmosphere is thin enough to allow energy to pass through it.
42.
What features make a planet habitable?
a)
Oxygen, Water, Proximity to the Sun and Food
b)
Carbon Dioxide, Proximity to the Sun, Habitat and artificial satelites
c)
Lots of radiation, extreme temperatures, no food, no shelter
d)
Extreme sunlight, dangerous predators, and salty water
43.
Which of these is NOT essential for habitability?
a)
Temperature
b)
Liquid Water
c)
Atmosphere
d)
Bacteria
44.
About how much of earth's atmosphere is Nitrogen?
a)
78%
b)
20%
c)
10%
d)
85%
45.
About how much of earth's atmosphere is Nitrogen?
a)
78%
b)
20%
c)
10%
d)
85%
46.
About how much of earth's atmosphere is Nitrogen?
a)
78%
b)
20%
c)
10%
d)
85%
47.
What are the 5 necessary characteristics for habitability that we researched this week?
a)
Temperature, Water, Atmosphere, Energy, Nutrients
b)
Temperature, Gravity, Atmosphere, Energy, Nutrients
c)
Atmosphere, Food, Water, Shelter, Gravity
d)
Air, Food, Water, Housing, Pets
48.

What does most every living thing need to survive?

a)

Steam

b)

Ice

c)

Plasma

d)

Liquid water

49.

What is the average temperature of a planet that is "Earth distance" away from the Sun?

a)

-360o F

b)

332o ​F

c)

61o ​C

d)

61o F

50.

What happens if a planet is too cold?

a)

The water will be nice and warm

b)

The water will be cold

c)

The water will boils away

d)

It will be like a giant snowball

51.

What determines where the habitable zone is located for each star?

a)

The star's distance from Earth

b)

The size of the star

c)

How many planets the star has

d)

The size of the planet

52.

Which of the following is not a characteristic of a habitable planet?

a)

Earth-sized

b)

terrestrial planet

c)

Within its stars habitable zone

d)

gas giant

53.

Which of the following is not a characteristic of a habitable planet?

a)

Earth-sized

b)

terrestrial planet

c)

Within its stars habitable zone

d)

gas giant

54.
How do astronauts protect their bone health while in space?
a)
drink lots of fluids
b)
exercise with equipment
c)
special space suits
d)
special medicine
55.
Why is a space suit insulated?
a)
regulate temperature- protect against hot/cold
b)
to keep the astronaut from dehydrating
c)
so they can use the bathroom in space
d)
so they can breathe
56.
a)

Planet A

b)

Planet B

c)

Planet C

d)

Planet D

57.
How do astronauts accommodate the need for food when space on the shuttle is limited?
a)
Dehydrated food
b)
Hunt in 
c)
Grow food on the shuttle
d)
Order take out
58.

What is the most important factor that determines Earth’s temperature?

a)

Amount of water on the planet

b)

Proximity to the Sun

c)

Gas composition of the atmosphere

d)

Distance to the Moon

59.

Earth is currently 150 million km away from the Sun. If Earth was 200 million km away from the Sun, it would no longer support life because –

a)

The surface water would evaporate.

b)

The temperature would be too cold.

c)

The oxygen would leave the atmosphere.

d)

There would be less exposure to solar wind.

60.
What are the conditions in space?
a)
extreme temperatures, no atmosphere, microgravity, Ultraviolet radiation
b)
extreme temperatures, no atmosphere, microgravity, no radiation
c)
extreme temperatures, no atmosphere, macrogravity, Ultraviolet radiation
d)
extreme temperatures, no atmosphere, macrogravity, Radiation
61.
What are some accommodations to help Astronauts in micro-gravity?
a)
Work out and Take supplements for proper nutrition 
b)
Lift weights and pump iron
c)
They don't need to do anything microgravity makes you stronger
d)
Plenty of sleep
62.
What is are the accommodations for living and working in space?
a)
Space shuttle, SpaceSuit, Exercising daily, freeze dried food
b)
Space shuttle, SpaceSuit, Exercising daily, freeze dried food, Television
c)
Just a ship and their phone
d)
Space suit, Rover, Telescope, food
63.
What does the space suit provide protection against?
a)
Extreme temperatures
b)
Muscle loss
c)
Bone loss
d)
Excessive oxygen

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