Physical Science
A student sits ice outside in the hot sun. It eventually melts into water. Did a new substance (chemical change) form?
NO
Why does our Sun appear brighter than other stars?
It is the closest star to our planet making it appear brighter than the others.
Does gravity pull us toward the very center of the Earth?
Yes, True.
These are all examples of what?
A baby starts to cry when it is born.
Bears hibernate during winter.
A salmon swims upstream.
A spider spins a web.
Instincts.
A sealed container is weighed before and after sugar dissolves in water. Does the mass stay the same. Why or why not?
It stays the same. Even though a solution was made after sugar dissolved, matter was conserved (unchanged).
What causes day and night on Earth?
Earth's rotation on its own axis.
A ball is kicked with a great force on a flat surface. Although it rolls for a long time, it eventually slows down and stops without anyone touching it. Why did it slow down and stop?
Friction from the surface worked against the ball to stop its motion.
Two puppies are born from the same parents. However, each puppy has a different fur color. One looks like mom, and one looks like dad.
What is it called when similar traits are passed to offspring like this?
Also, what do we call changes in these traits between related offspring?
INHERITED TRAITS, and we call the differences VARIATIONS.
A student mixes baking soda and vinegar and sees bubbles. What type of change happened (chemical or physical)? Also, was a new substance formed?
Chemical change (bubbles), and yes chemical changes means a new substance has formed.
What type of Galaxy is the Milky Way? Also, name one OTHER TYPE of Galaxy.
Milky Way = Spiral
Others include: Irregular, Elliptical, Lenticular
Two children hit a Gaga ball toward one another with the exact same force. What happens to the ball if these forces are balanced?
The ball does not move and stays in the same spot.
These are all examples of what:
A dog sits on command by their owner.
A monkey puts clothes on correctly.
Raccoons go straight to a man's dumpster, open it up, and take food out to eat.
These are all LEARNED BEHAVIORS.
A chart shows water changing from solid → liquid → gas as temperature rises.
What is the melting/freezing point in Celsius and Fahrenheit?
What is the boiling point in Celsius?
Melting/Freezing = 32 Fahrenheit & 0 Celsius
Boiling = 100 Celcius
A model shows Earth tilted while orbiting the Sun. What does this explain?
Different seasons of the year.
Michael and Steven are playing tug-o-war with a rope. Michael pulls the rope with a force of 15N. Steven pulls with a force of 20N. Who wins the game and by how much force did they win?
Steven wins with 5N more force than Michael.
The black beatles will likely survive better due to a change in the environment, where they are now better camouflaged.
A student claims dissolving salt is a chemical change. Is it? Also, what are you making when you dissolve salt into saltwater?
No, it is a physical change. No new substance was created. You are making a solution.
Two locations receive different daylight hours. What two things are the main cause cause?
Earth's tilt + Earth's current position in orbit around the sun.
Describe what happens in 1 day on Earth.
Describe what happens in 1 month on Earth.
Describe what happens in 1 year on Earth.
Day - Earth rotates 1 full time on its axis.
Month - The moon completes 1 full orbit around the Earth.
Year - The Earth completes 1 full orbit around the Sun.
Question: Which of the following is an example of an instinct in an animal?
A) A bear cub learning to avoid a specific type of prickly bush
B) A sea turtle hatchling crawling toward the ocean immediately after hatching
C) A chimpanzee using a stick to fish for termites after watching its mother
D) A parrot repeating words it hears its owner say
B) A sea turtle hatchling crawling toward the ocean immediately after hatching