Forces
Define balanced force
A: force where two forces of equal size, act on a body, in opposing directions
B: force applied to an object in opposite directions that are not equal in size causing a change in motion
C: resistance that one surface or object encounters when moving over another
A: force where two forces of equal size, act on a body, in opposing directions
True or False: Matter can change phases
True
True or False: The Law of Conservation of Mass is explored to demonstrate that matter cannot be lost or regained
True
Earth orbits around the ____. This process takes ____ days.
Earth orbits around the Sun. This process takes 365 days.
Organisms have different types of behaviors. Some of these behaviors are natural responses called instincts. Other behaviors are learned through the use of an organism’s senses through interactions with the environment. Which three behaviors are examples of instincts?
M. birds returning to a bird feeder for food
P. monkeys using tools
R. ants living in a colony
S. sea turtles swimming
T. geese flying in a group
M. birds returning to a bird feeder for food
P. monkeys using tools
R. ants living in a colony
S. sea turtles swimming
T. geese flying in a group
Define unbalanced force
A: force where two forces of equal size, act on a body, in opposing directions
B: force applied to an object in opposite directions that are not equal in size causing a change in motion
C: resistance that one surface or object encounters when moving over another
B: force applied to an object in opposite directions that are not equal in size causing a change in motion
All matter is made up of atoms which can't be seen with just your eyes. What are atoms?
A smallest unit of ordinary matter that forms a chemical element
B a mid-sized element that is found in most materials
C smallest unit of oxygen we can breathe
A smallest unit of ordinary matter that forms a chemical element
True or False: Matter cannot undergo phase changes between a solid, liquid, or a gas. If something starts out solid it will always remain solid.
False
Ice is a great example of a solid that can change phases to water and water vapor.
The ____ orbits around the Earth. This revolution, time it takes to make one trip, is about ___ hours.
The moon orbits around the Earth. This revolution, time it takes to make one trip, is about 24 hours.
A glass contains 300 grams of water. A student puts 25 grams of sugar in the water. The student then stirs the water until the sugar is no longer visible. What is the mass of the mixture in the glass?
M. 25 grams
P. 275 grams
R. 300 grams
S. 325 grams
M. 25 grams
P. 275 grams
R. 300 grams
S. 325 grams
Define friction
A: force where two forces of equal size, act on a body, in opposing directions
B: force applied to an object in opposite directions that are not equal in size causing a change in motion
C: resistance that one surface or object encounters when moving over another
C: resistance that one surface or object encounters when moving over another
An example of a physical change would be:
A burning a log
B breaking a glass bowl
C baking a cake
B breaking a glass bowl
True or False: Earth has a specific place in the Universe, which can explain relative distance and why the Sun appears brighter than other stars.
True although we move to orbit the Sun, we have a specific path we take.
The Earth spins on it's _____, an imaginary line going through the center, as it travels around the Sun.
Word bank: comet, equator, axis, revolution, moon phases, waxing
The Earth spins on it's axis, an imaginary line going through the center, as it travels around the Sun.
Word bank: comet, equator, axis, revolution, moon phases, waxing
Which of these most likely describes a behavior that an animal learns and is not an instinct?
A. A moth keeps flying around a bright light many times.
B. A kitten makes purring sounds as a mother cat cleans its fur.
C. A dog sits quietly and waits while its owner opens a bag of dog treats.
D. A sea turtle returns to the location where it was hatched and lays its eggs there.
A. A moth keeps flying around a bright light many times.
B. A kitten makes purring sounds as a mother cat cleans its fur.
C. A dog sits quietly and waits while its owner opens a bag of dog treats.
D. A sea turtle returns to the location where it was hatched and lays its eggs there.
What forces are at work when you are on a swing set? Describe the pattern of motion.
Up and back down motion; legs using forces to lift up; gravity pulling back down; friction between your body and the seat
An example of a chemical change would be
A breaking a pencil
B melting ice
C cooking an egg
C cooking an egg
True or False: The positions of the Sun, Moon, and Earth don't affect what we see in the day and night sky, including positions of constellations.
False the Sun, Moon, and Earth all have important positions in the sky that influence how we see things.
Does the moon look the same in the sky every night? Why or why not?
No, the moon is seen in phases due to the positions of the sun, earth, and moon.
Students completed four investigations where they combined two different substances. Which investigation shows evidence that the chemical properties of the substances changed?
A. Sand sinks in water when water and sand are combined.
B. Salt dissolves in water when salt and water are combined.
C. Bubbles form when baking soda and vinegar are combined.
D. Vegetable oil coats the surface of lettuce when oil and lettuce are combined.
A. Sand sinks in water when water and sand are combined.
B. Salt dissolves in water when salt and water are combined.
C. Bubbles form when baking soda and vinegar are combined.
D. Vegetable oil coats the surface of lettuce when oil and lettuce are combined.
You are wearing socks and walking on a frozen lake. Is this a setting with high friction or low friction? How could you change the amount of friction?
Low friction, you could wear shoes with spikes or add grips to the bottom.
What is the difference between a mixture and a solution?
mixture is a material made up of two or more different substances which are not chemically combined
solution is a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).
True or False: Fossils can help us determine how rock strata formed.
True, fossil can tell us a lot about geography.
The tilt of the Earth’s axis as it revolves around the Sun impacts how much _____ a location receives throughout a year.
The tilt of the Earth’s axis as it revolves around the Sun impacts how much direct sunlight a location receives throughout a year.
Which of these best describes the positions of the sun, the moon, and Earth during a solar eclipse?
A. The sun, the moon, and Earth are in a straight line, and the moon is between the sun and Earth.
B. The sun, the moon, and Earth are in a straight line, and the sun is between the moon and Earth.
C. The sun and Earth are in a straight line. The moon is not in a line but is at an angle between Earth and the sun.
D. The sun and Earth are in a straight line. The moon is not in a line but is at an angle on the side of Earth away from the sun.
A. The sun, the moon, and Earth are in a straight line, and the moon is between the sun and Earth.
B. The sun, the moon, and Earth are in a straight line, and the sun is between the moon and Earth.
C. The sun and Earth are in a straight line. The moon is not in a line but is at an angle between Earth and the sun.
D. The sun and Earth are in a straight line. The moon is not in a line but is at an angle on the side of Earth away from the sun.