What is the difference between revolution and rotation?
Revolution is to orbit an object like the sun, rotation means to spin on an axis.
100
What is first in any food chain or energy flow?
sun
100
How does the size of a force affect motion?
Large forces make objects move faster or stop faster than a small force on the same object.
100
How long does it take the Earth to rotate once? How long does it take the Earth to orbit the sun once?
rotate - one day
revolve/orbit the sun - one year
100
What type of energy makes it possible to hear sound?
Sound Energy
200
What is a producer?
An organism that makes their own food through photosynthesis.
200
Name a food chain or energy flow in your neighborhood.
ans vary: sun>grass>mouse>snake>eagle
200
Brock pushes a toy car on a track. What force causes the car to move?
A) Gravity
B) Friction
C) Brock is applying a force
C) Brock is applying a force
200
What event happens on Earth as the Earth spins?
A) we have different seasons
B) We have day and night
C) We see the different phases of the moon
B) We have day and night
200
What creates sounds.
vibrations
300
What is the transmission of light?
light passing through an object
300
Name one producer, one consumer, and one decomposer
ans. vary
300
The speed of an object can be found by solving what equation?
Distance divided by time
300
The moon _________ around the Earth.
Rotates? Revolves? or Neither?
Revolves
300
Your dog is coming toward you. You try to stop him. What type of force would you apply to stop him? Does the force needed to stop him depend on how fast he is running? Explain.
A push is needed to stop him. Yes the force needed to stop him would be greater if he is moving faster because it takes more force to stop a heavy or fast moving object.
400
What is the name of the relationship between 2 organisms that they both benefit?
Mutualism
400
Name one incident that may cause a predator population to decrease.
Examples: A decrease in prey populations, illness, disease, loss of habitat
400
What is needed for an object at rest to begin moving?
a force
400
Name 2 dwarf planets OR explain 2 reasons why a dwarf planet is not considered a planet.
Haumea, Pluto, Ceres, Iris, Makemake OR too small and have an irregular orbit around the sun
400
Give an example of an object that absorbs light, one that reflects light, and one that refracts light.
book, window, water in a glass cup
500
___________________ is the number of vibrations per second a sound makes.
Frequency
500
In this simple food chain, grass>grasshopper>mouse>snake, what will most likely happen to the snake and mouse population if pesticide is sprayed to kill the grasshoppers?
Both the mouse and the snake population will decrease unless they can find another food source.
500
A force in the opposite direction as motion will affect speed by ______________.
slow down or stop the object
500
Name two advantages of using space craft instead of space probes.
ans vary: people can make judgements to investigate something further, people can fix things that may break on a space craft
500
What is the difference between the volume and the pitch of a sound?
Volume is how loud a sound is, pitch is the tone of a sound