Nature of Science
What is an educated guess predicting the answer to a scientific question?
a) experiment
b) hypothesis
c) control
d) variable
B) hypothesis
a) chemical changes
b) state of matter
c) physical properties
d) temperature
c) physical properties
What type of energy is stored in food, batteries, and fuel?
a) chemical
b) mechanical
c) electrical
d) sound
a) chemical
What travels through the wire in a closed circuit to create electricity?
a) lightning
b) protons
c) neutrons
d) electrons
d) electrons
What force brings objects toward the ground on Earth?
Gravity
What is the term for the one group that you keep the same (do not change) to compare your results in an experiment to?
a) hypothesis
b) variable
c) control
d) data
C) control
What are the freezing and boiling points of water (in celsius)?
0 degrees C- freezing
100 degrees C- boiling
You make breakfast using the toaster. How did the energy transfer when using the appliance?
a) from thermal to electrical
b) from thermal to sound
c) from chemical to sound
d) from electrical to thermal
d) from electrical to thermal
Which of the following is not a good conductor?
a) copper penny
b) steel wool
c) metal paperclip
d) plastic spoon
d) plastic spoon
True or False: The greater the force, the greater the change in motion will be.
True
A homemade volcano is an example of ...
a) an experiment
b) repeated observation
c) a model
d) a science fair project
c) a model
List the 3 ways to speed up the dissolving rate of a substance.
1. Stirring
2. Adding heat
3. Breaking into smaller pieces (more surface area)
When energy is stored in an object based on it's position, this is called...
a) kinetic
b) potential
c) chemical
d) sound
b) potential
False, the circuit must be CLOSED.
Opposite poles of a magnet (North and South) will...
a) attract
b) repel
c) spin around
d) do nothing
a) attract
Which of the following decisions could best be made using a scientific method?
a) what games will be the most fun to play at recess
b) which fertilizer is the most effective to use in your garden
c) which book do you prefer to read
d) how does a volcano erupt
B) which fertilizer is the most effective to use in your garden
a) water boiling on the stove
b) leaves changing color in fall
c) rust forming on steel wool
d) baking a cake in the oven
a) water boiling on the stove
(it just changes state from liquid to gas, nothing new is created)
Describe how the energy of a fan that is plugged into a wall works.
Energy transfers from ________ to _________ and __________.
Energy transfers from electrical to mechanical and sound.
True or False: If one light does not work in a series circuit, all other lights will not work.
True, there is only one path.
The force that resists (goes against) motion is...
a) gravity
b) friction
c) speed
d) position
b) friction
Paul closely examined a model of a human heart with all the parts of a heart. It did not show how blood moves in the heart or the body. What did Paul learn from examining the model?
a) how blood circulates through the body
b) how the heart connects to the lungs
c) the parts of the heart
d) what a real heart feels like
c) the parts of the heart
Which of the following is NOT a physical change?
a) water freezing
b) breaking a vase
c) cracking an egg
d) water and vinegar combining to form carbon dioxide
d) water and vinegar combining to form carbon dioxide
Sound energy travels through vibrations. When vibrations are more frequent, the sound is...
a) louder
b) softer
c) a higher pitch
d) a lower pitch
c) a higher pitch
No, it does not have a power source (battery)
You and a friend play tug of war. You pull to the left with a force of 20 newtons. Your friend pulls to the right with a force of 32 newtons. What direction will win? By how many newtons?
The friend to the right will win with a force of 20 newtons.