natural selection
What is the process by which animals best suited to their environment survive and reproduce?
Natural selection
What is a push or pull called?
A force
What type of energy does food give us?
Chemical
What is the closest star to Earth?
Sun
How many seasons are there in a year?
Four
Who is the scientist most famous for the theory of natural selection?
Charles Darwin
What force pulls objects toward Earth
Gravity
What kind of energy comes from the sun?
Solar
What do stars mostly burn for energy?
Hydrogen
This season begins around March 20th in the Northern Hemisphere.
Spring
What do we call a trait that helps an organism survive?
An adaptation
If something is not moving, what kind of force is acting on it
Balanced force
Sound travels in what kind of pattern
Waves
What color are the hottest stars?
Blue
The Earth is tilted at this angle, which causes the seasons.
23.5 degrees
True or False: All offspring are identical to their parents?
False
What unit is used to measure force
Newtons
What kind of energy makes things move?
Mechanical energy
What do you call a group of stars forming a pattern?
Constellation
When it is winter in the Northern Hemisphere, it is this season in the Southern Hemisphere.
Summer.
What happens to traits that help survival over many generations?
They become more common
What two things do you need to know to find speed?
Distance and time
What material does sound travel fastest through—solid, liquid, or gas?
Solid
What is a large explosion at the end of a big star’s life called?
Supernova
The shortest day of the year in the Northern Hemisphere happens during this solstice.
Winter Solstice.