Motion
This is the measure of how far an object moves in a certain amount of time
Speed
When light hits a shiny surface and bounces off, this process is called what?
Reflection
Sound is produced by this type of motion of objects.
Vibrations
The star at the center of our solar system is called the what?
The sun.
Organisms that make their own food using sunlight are called what?
Producers
Name the two factors that are needed for speed.
Time and distance
What happens to light when it passes from air into water and appears to change direction?
The light bends and refraction occurs.
Through which of these (air, vacuum, or both) can sound travel?
Air
How long does it take Earth to complete one revolution around the sun?
365 days.
What role do decomposers play in an ecosystem?
Breakdown organisms to make nutrients.
If two forces act in opposite directions on an object and are not equal, what will happen to the object’s motion?
The forces are unbalanced;the object will accelerate
Name three things that can happen to light when it meets an object or a new medium.
Reflect, Refract, Absorb
If an object vibrates faster, what happens to the pitch of the sound we hear?
The pitch becomes higher.
What causes day and night on Earth?
Earth's rotation.
In a food chain, the sun provides energy to plants. Plants are eaten by animals called...
Herbivores
A heavier bowling ball and a lighter tennis ball are pushed with the same force. Which will have a smaller change in motion and why?
The bowling ball because it has a larger mass.
When light interacts with an object, it can be reflected, refracted, or absorbed. What happens to the light energy that is absorbed by an object?"
It is converted into other forms of energy, usually heat
Light is sometimes reflected when it strikes an object. Which behavior of sound is similar to light being reflected?
A. echoing off a cliff
B. traveling through air
C. being absorbed by walls
D. bending around a building
A. echoing off a cliff
Explain why the sun appears larger and brighter than other stars in our sky even though many stars are actually bigger.
If there are more predators in an ecosystem than there is food available, what will most likely happen to the predator population?
It will decrease.
An object at rest will stay at rest unless acted upon by an unbalanced force. This is an example of which of Newton's three laws?
Newton's 1st Law of Motion
A teacher has a car sun shade that is supposed to be placed behind his windshield to keep the inside of his car cool in the summer. The sun shade is shiny on one side and black on the other side. Which statement explains how the sun shade should be positioned to keep the car the coolest?
A.The shiny side should be facing outward so that the sunlight will reflect off the sun shade.
B. The black side should be facing outward to absorb the sunlight shining on the sun shade.
C. The shiny side should be facing outward to absorb the sunlight shining on the sun shade
D. The black side should be facing outward so that the sunlight will reflect off the sun shade.
A.The shiny side should be facing outward so that the sunlight will reflect off the sun shade.
A teacher makes a model guitar by using an open box for the guitar body and rubber bands for the strings. Students observe the pitch of sound produced by each rubber band depends on how tight the rubber band is. Why can the tightness of the rubber band determine the different pitch of sound?
It makes the rubber band vibrate faster or slower.
Name three types of objects besides planets that orbit the sun.
Asteroids, comets, dwarf planets.
A food web is more realistic than a food chain because it shows that most organisms eat MORE than one type of food. If a rabbit eats grass and clover, and a fox eats rabbits and mice, what type of organism is the fox?
A carnivore.