Force, Mass, Motion
Nature of Science / Scientific Method
Energy
Atomic Theory / Matter
Phys & Chem Changes / Temperature
100
Mention an example of a force that acts at a distance.
Magnetic / Gravity / Electrical Charges
100
Alan had 4 test tubes with water and added different amounts of chlorine to 3 of the test tubes. He left all 4 test tubes at room temperature for a week to see if algae would grow. Which of the following is the constant in the experiment? A) the amount of algae present B) the temperature of the test tubes C) the amount of chlorine present D) the ratio of algae to chlorine
B) the temperature of the test tubes
100
Mention 2 types of potential energy.
Gravitational PE / Chemical / Elastic
100
Has a definite volume, but not a definite shape. A) Solid B) Liquid C) Gas
B) Liquid
100
Heat ____the reaction rate (the speed of a chemical reaction). A) increases B) decreases
A) increases
200
Define Force.
Push or pull on an object.
200
Alan had 4 test tubes with water and added different amounts of chlorine to 3 of the test tubes. He left all 4 test tubes at room temperature for a week to see if algae would grow. Which of the following is the dependent variable? A) the amount of algae present B) the temperature of the test tubes C) the amount of chlorine present D) the ratio of algae to chlorine
A) the amount of algae present
200
The KE of an object depends on two factors: _______ & ______
mass & speed
200
Sound waves travel the fastest in this state of matter. Mention the state of matter and explain why.
Solid - Sound is produced by the vibration of particles. In a solid particles are the closest and can transfer the vibration faster.
200
All changes of state (freezing, evaporating, melting, etc.) are ______ changes.
physical
300
1- What is a balanced force? 2- How do you know that the forces acting on an object are balanced?
1- When the NET FORCE=0 (net force = sum of all forces acting on an object). 2- If the object is NOT MOVING.
300
Alan had 4 test tubes with water and added different amounts of chlorine to 3 of the test tubes. He left all 4 test tubes at room temperature for a week to see if algae would grow. Which of the following is the independent variable (testing variable)? A) the amount of algae present B) the temperature of the test tubes C) the amount of chlorine present D) the ratio of algae to chlorine
C) the amount of chlorine present
300
The GPE depends on two factors: _______ & ______.
mass & height
300
Mention the states of matter in increasing order of energy.
Solid --> Liquid --> Gas
300
Mention 2 examples of physical changes & 2 of chemical changes. All examples must be correct. If a group gets them wrong, the next group must come up with different examples.
Physical - melting, cutting, bending ... / Chemical - burning, cooking, baking, exploding, reacting...
400
How does the distance between the objects and their masses relate to the gravitational force between them?
MORE DISTANCE = LESS GF MORE MASS = MORE GF
400
Alan had 4 test tubes with water and added different amounts of chlorine to 3 of the test tubes. He left all 4 test tubes at room temperature for a week to see if algae would grow. Create an appropriate hypothesis (or prediction in "If..., then..." format) for this experiment.
- Adding chlorine to water will reduce the probability of algae growth. - The presence of chlorine in water reduces (or prevents) algae growth. - If I add chlorine water, then algae growth will be reduced.
400
Which one has the most KE: A) A bike at 10 mi/hr B) A bike at 5 mi/hr C) A truck at 10 mi/hr D) A truck at 5 mi/hr
C) A truck at 10 mi/hr
400
What happens (at the molecular level in terms of heat and particle motion) when you place water in the freezer to make ice?
Heat flows from the water to the surroundings (the freezer) & the particle's motion decreases (they slow down) until they end up in fixed position (transforming from a liquid to a solid).
400
Physical or Chemical Change? All must be correct. 1- Dying (bleaching) your hair 2- Food spoiling 3- Squeezing oranges for juice 4- Mowing the lawn 5- Freezing water
1- Dying (bleaching) your hair (Chemical) 2- Food spoiling (Chemical) 3- Squeezing oranges for juice (Physical) 4- Mowing the lawn (Physical) 5- Freezing water (Physical)
500
Differentiate between mass & weight.
Mass = amount of matter in an object & it DOESN'T change depending the location of the object. Weight = force exerted on a body by gravity & IT CHANGES depending on the location of the object.
500
Dr. Fred Whipple proposed that a comet was like a dirty snowball. This is an example of: A) a law. B) a hypothesis. C) a theory.
B) a hypothesis
500
If a ball is rolling down a hill, when would the PE & the KE be the same? A) At the top of the hill B) About half way down the hill C) About 3/4 down the hill D) At the bottom of the hill
B) About half way down the hill
500
Describe the movement of the particles in each state of matter (solid, liquid & gas).
Solid = vibrate in fixed positions Liquid = slide past each other Gas = constant-random-nonstop-free movement.
500
How would you separate a mixture of iron filings, sand and sugar? Mention all the steps you would take.
1- Use a magnet to separate the iron filings. 2- Add water to dissolve the sugar. 3- Filter to separate the sand. 4- Boil to separate the sugar.
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