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Unit 3 Test Reveiw

Total questions: 22

Worksheet time: 13mins

Name
Class
Date
1.

Which of the following means a new substance has been formed?

a)

Solid becomes liquid

b)

Substance changes color

c)

Solid dissolves to liquid

d)

Volume increases

2.

Which shows a new substance is produced?

a)

tablets dissolve

b)

water becomes cloudy

c)

water level increases

d)

bubbles are given off

3.

Which is NOT a chemical change?

a)

ice melting

b)

egg frying

c)

nail rusting

d)

match buring

4.

Why is ice melting NOT a chemical change?

a)

Water and ice are both cold

b)

water and ice are both wet

c)

Water and ice are made of the same molecules

5.

Which is more easily reversed?

a)

Physical Change

b)

Chemical Change

c)

Neither

6.
Which of the following best explains the external stimulus that is causing the response in the picture?
a)
The tree, stimulated by the weather, is responding by growing towards the sky
b)
The tree, stimulated by the sunlight, is responding by growing towards the sun
c)
The tree, stimulated by the piano, is responding by growing through the piano.
d)
The tree, stimulated by the lack of water, is responding by growing at a slower rate
7.
As the season turns from winter to spring, what is the most likely response that a bear's body has to the changing season?
a)
The bear stores more body fat to maintain the necessary body heat and more nutrition because there may be less prey.
b)
The bear produces less fur and begins shedding to allow its body temperature to adjust the warming climates
c)
The bear's fur becomes darker so it is easier to hide from its prey
d)
The bear begins to store food and find shelter for hibernation
8.
A cheetah's water levels are becoming too high, and its thirst is quenched. In response to this, the cheetah's body will send internal signals...
a)
Of hunger, since the cheetah needs food
b)
Of thirst, since all living things need water
c)
To sweat, so the organism can shed some of the water
d)
Of quenched thirst, so the organism will stop drinking water
9.
There is high temperature outside. What type of response can a person's body have to regulate body temperature?
a)
Wearing a jacket
b)
Sweating
c)
Taking an ice bath
d)
Wearing a visor
10.
Steven sets a brand new plant near the window. After several weeks Steven realizes the flower is starting to tilt towards the sunlight. What would be considered the stimuli in this scenario?
a)
Water
b)
The dirt in the flower pot
c)
The sunlight
d)
The window
11.

1 A group of students are investigating the transformation of energy during digestion. The initial temperature of hydrogen peroxide in a beaker is measured and recorded. Small pieces of liver are placed into a beaker of hydrogen peroxide and the temperature is measured and recorded every 30 seconds over a two minute time period.

What energy transformation is under investigation in the scenario above?

a)

A Thermal energy transformed into chemical energy

b)

B Chemical energy transformed into thermal energy

c)

C Chemical energy transformed into mechanical energy

d)

D Mechanical energy transformed into thermal energy

12.

2 Which of the following best illustrates the transfer from chemical energy to thermal energy?

a)
b)
c)
d)
13.

5 Which of the following energy transformations occur when humans use energy from food to exercise?

a)

A Mechanical --> thermal --> chemical

b)

B Thermal --> electrical --> mechanical

c)

C Radiant --> mechanical --> thermal

d)

D Chemical --> mechanical --> thermal

14.

7 Which of the following best describes the energy conversions that occurs during photosynthesis?

a)

A Chemical energy is changed into solar energy.

b)

B Solar energy is changed into mechanical energy.

c)

C Chemical energy is changed into heat energy.

d)

D Solar energy is changed into chemical energy.

15.

A plant's response to touch

a)

thigmotropism

b)

geotropism

c)

hydrotropism

d)

dormancy

16.

Water, light, ,earth, and touch are examples of

a)

dormancy

b)

tropisms

c)

stimulus

d)

hibernation

17.

The movements in a plant in response to light

a)

phototropism

b)

geotropism

c)

hydrotropism

d)

thigmotropism

18.

When a seed germinates, why do roots grow downward toward the ground?

a)

positive thigmotropism

b)

negative hydrotropism

c)

positive geotropism

d)

negative phototropism

19.

A characteristic or trait that helps an organism survive in its environment is a/an ​ ​ (a)  

Choose from the below words
adaptation
skill
variation
natural instinct
20.

The gills have allowed a fish to adapt to living underwater because gills allow the fish to (a)  

Choose from the below words
breathe underwater
swim faster
change color
grow bigger
21.

which is the learned behavior?

a)

shape of beak

b)

monkey riding bicycle

c)

horse eating hay

d)

snake eating mice

22.
How do adaptations help animals?
a)
To escape animals
b)
to hunt for food
c)
to survive in their habitats
d)
All of these are correct

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