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Lashunda Practice Science EC-6

Total questions: 65

Worksheet time: 1hrs 11mins

Name
Class
Date
1.

Before deciding what kind of birdseed to purchase, Jacob watches his backyard for thirty minutes each afternoon and records the types of birds he sees. What kind of scientific investigation is this?

a)

controlled experiment

b)

using models

c)

repeated observations

d)

This is not a scientific investigation

2.

Sumyut wants to measure the difference in reaction time between boys and girls. Before beginning his experiment, he does some research on nerves and reaction time. Which reference should he use?

a)

a post shared on Instagram

b)

a research report written by a classmate

c)

the first website in the Google search results

d)

an interview with a neurosurgeon

3.

To test how different building materials respond to earthquakes, a class places houses made of different materials on jello. In this activity, what is the jello?

a)

a dependent variable

b)

an independent variable

c)

a model

d)

a controlled experiment

4.

Which statement is an example of a scientific law?

a)

"The data from this experiment does not support our hypothesis."

b)

“We measured the mass of the object and it is 300 grams.”

c)

“Based on research, we predict a heavier object will fall at the same rate as a lighter one.”

d)

"When dropped, an object always falls toward the center of Earth.”

5.

Which statement best describes scientific theories?

a)

Theories are claims made by scientists in history.

b)

Theories are reasons for scientists to perform experiments.

c)

Theories are explanations for phenomena in the natural world.

d)

Theories are repeated experiments about phenomena in the natural world.

6.

Years ago, people believed in a geocentric model of the universe. Which statement best explains why the beliefs about Earth's position in the universe changed over time?

a)

People became more intelligent over time.

b)

More scientists believed that Earth was not at the center of the universe than believed that Earth was the center of the universe.

c)

Ancient cultures lacked the tools to see the true center of the universe.

d)

Evidence refuting a geocentric model was presented.

7.

What step does every scientific experiment begin with?

a)

hypothesis

b)

question/problem

c)

procedures

d)

conclusion

8.

The variable that is being measured or observed is called the _______________. Hint: this is the variable that is the result or effect

a)

independent variable

b)

dependent variable

c)

control variable

9.
To examine data and reach conclusions that explain their observations
a)
Observing
b)
Applying imagination
c)
Inferring
d)
Using logical reasoning
10.
During a storm, the power goes out at Randall's house. His mother strikes a match to light a candle. As the match burns, it gives off light energy.
What other form of energy does the burning match give off?
a)
chemical
b)
electrical
c)
mechanical
d)
thermal
11.
Miguel is rolling a ball down a hill. This is an example of which form of energy?
a)
chemical energy
b)
electrical energy
c)
mechanical energy
d)
thermal energy
12.
Latisha notices that when she rubs her hands together, they feel warm.
Which of the following is the best explanation for why this happens?
a)
energy is reflected into her hands
b)
heat energy is produced by the friction
c)
light energy of the Sun heats her hands
d)
energy is absorbed from the air molecules by her hands
13.

Which type of force resists motion?

a)

Friction

b)

Gravity

c)

Pull

d)

Push

14.

If two toy trucks are pushed with the same force, Which one will move the longest distance?

a)

The one with more mass

b)

The one with less mass

c)

The mass will make no difference

15.

What happens in a game of tug-a-war when both teams pull the rope with equal force and in opposite directions?

a)

The rope does not move

b)

Both teams move to the right

c)

Both teams move to the left

d)

Both teams fall down

16.

A student is pushing a book with a force of 10 Newtons to the left. Another student is pushing the book to the right. How many Newtons of force is the second student pushing with if the book is not moving?

a)

10 Newtons

b)

5 Newtons

c)

0 Newtons

d)

1 Newton

17.
When forces on an object are balanced, what is the force?
a)
Five
b)
Ten
c)
Six
d)
Zero
18.
How can you increase the acceleration of an object?
a)
decrease its mass
b)
increase its friction
c)
increase its mass
d)
decrease the force applied to it
19.
What does this graph represent?
a)
Constant Speed
b)
Acceleration
c)
Not moving
20.
______ measures an object's tendency to resist changing its motion.
a)
Acceleration
b)
inertia
c)
Gravity
d)
weight
21.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
22.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
23.
Which graph best represents a graph of a car travelling down a freeway at a CONSTANT speed?
a)
A
b)
B
c)
C
d)
D
24.
The snail is traveling at 5 cm/hr. This is an example of
a)
speed
b)
forces
c)
acceleration
d)
velocity
25.
The net force of the following diagram is
a)
620N→
b)
To the right→
c)
20N←
d)
balanced↔
26.
What is the speed of the object represented by the graph?
a)
0.5 m/s
b)
2 m/s
c)
5 m/s
d)
4 m/s
27.
a change in position is defined as
a)
force
b)
motion
c)
speed
d)
acceleration
28.
Roller coasters use potential and kinetic energy to move carts around the track. Which selection below organizes the points of potential energy from GREATEST to LEAST?
a)
6,4,1
b)
1,4,6
c)
2,3,5
d)
5,3,2
29.
Potential energy refers to objects that have ________________________ .
a)
changing chemically
b)
stored energy
c)
in motion
d)
changing electrically
30.

What type of energy transformation occurs, when a hawk eats a mouse and then uses the energy from the mouse to fly?

a)

mechanical energy to chemical energy

b)

thermal energy to mechanical energy

c)

chemical energy to mechanical energy

d)

mechanical energy to thermal energy

31.

What is the energy transformation that occurs in an electric pencil sharpener?

a)

mechanical energy to electrical energy

b)

electrical energy to mechanical energy

c)

radiant energy to sound energy

d)

chemical energy to mechanical energy

32.

Which object shows an energy transformation from electrical to mechanical?

a)
b)
c)
d)
33.

The roller coaster cart has the most kinetic energy at position-

a)

W

b)

X

c)

Y

d)

Z

34.
A hairdryer converts -- 
a)
electrical energy into chemical
b)
electrical energy into thermal
c)
chemical energy into mechanical
d)
thermal energy into mechanical
35.

Which items would have this energy transformation: chemical energy -> thermal and light energy?

a)

tanning bed

b)

candle burning

c)

wind turbine turning

d)

solar calculator

36.

Which items would have this energy transformation: mechanical energy -> sound energy?

a)

turning on a flashlight

b)

nuclear power plant

c)

wind turbine turning

d)

playing a violin

37.

Which items would have this energy transformation: mechanical energy -> electrical energy?

a)

turning on a flashlight

b)

nuclear power plant

c)

wind turbine turning

d)

tanning bed

38.

Which energy does the sun produce? (2 answers)

a)

Mechanical Potential Energy

b)

Electrical Kinetic Energy

c)

Radiant Kinetic Energy

d)

Thermal Kinetic Energy

39.

If the speed of an object increases, what also increases?

a)

potential energy

b)

solar energy

c)

static energy

d)

kinetic energy

40.

What type of energy does a battery contain?

a)

electrical kinetic energy

b)

electrical potential energy

c)

electrical neuron energy

d)

electromagnetic pulsar energy

41.

According to the Law of Conservation of Energy, when one form of energy is transformed into another, __________ energy is lost in the process

a)

no

b)

some

c)

all

42.

_________ CANNOT be created or destroyed

a)

energy

b)

transformation

c)

motion

d)

pendulums

43.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
44.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
45.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
46.

Which point has the most potential energy?

a)

G

b)

F

c)

B

d)

A

47.
How much potential energy is at the top of a hill on a rollar coaster ride
a)
100%
b)
50%
c)
0%
d)
20%
48.
Energy can not be created or destroyed, only converted from one form to another.
a)
true
b)
false
49.
Gravitational potential energy depends on the ________ and ________ of the object. 
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction 
50.
A __________ is a chunk of ice & dust that has a bright head & a long narrow tail.
a)
asteroid
b)
planet
c)
meteoroid
d)
comet
51.
How long does it take Earth to complete one revolution around the Sun?
a)
24 hours
b)
one week
c)
one month
d)
one year
52.
Earth completes one full ___________ on its axis every 24 hours.
a)
rotation
b)
revolution
c)
resolution
d)
reservation 
53.
Which planet is between Venus and Mars?
a)
Earth
b)
Neptune
c)
Mercury
d)
Jupiter
54.
Select the order from smallest to largest.
a)
Sun, Milky Way, solar system, universe
b)
Sun, Milky Way, universe, solar system
c)
Sun, solar system, Milky Way, universe
d)
Sun, solar system, universe, Milky Way
55.
What is the correct order of the planets from the sun? 
a)
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
b)
Mercury, Earth, Venus, Mars, Jupiter, Saturn, Uranus, Neptune.
c)
Mercury, Venus, Earth, Mars, Saturn, Jupiter, Uranus, Neptune. 
d)
Mars, Venus, Earth, Mercury, Jupiter, Saturn, Uranus, Neptune. 
56.
What characteristic is Jupiter known for?
a)
Rings of ice and dust
b)
Great Red Spot
c)
Olympus Mons
d)
Fire
57.
Which planet is known for having an extreme tilt on its axis causing extreme seasons?
a)
Neptune
b)
Mercury
c)
Venus
d)
Uranus
58.
What characteristics do Earth and Venus share? 
a)
They rotate in the same direction
b)
They are both similar size and density
c)
They have the same gases in their atmospheres
d)
They were born at the same time
59.
What factor determines the color of a star?
a)
Size
b)
Shape
c)
Magnitude
d)
Temperature
60.
Which is the largest object in our solar system?
a)
Sun
b)
Jupiter
c)
Earth
d)
Pluto
61.

About how long does it take for the moon to complete it's cycle?

a)

2 weeks

b)

365 days

c)

one month

d)

one week

62.

Choose the correct order of the lunar phases.

a)

New, 1st Quarter, 3rd Quarter, Full

b)

1st Quarter, Full, New, 3rd Quarter

c)

3rd Quarter, Full, New, 1st Quarter

d)

New, 1st Quarter, Full, 3rd Quarter

63.
For a solar eclipse to occur, what has to happen?
a)
The sun must be directly between Earth and the moon.
b)
The moon must be directly between Earth and the Sun.
64.
During a solar eclipse...
a)
The sun is blocked
b)
The Earth is blocked
65.
Solar eclipses occur during which Moon phase?
a)
New Moon
b)
Waning Crescent
c)
Waxing Crescent
d)
Waning Gibbous

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