Physical Science Chapter 1 & 2 – Flashcards

A controlled experiment has all variables held constant. True False

A statement describing a relationship that is observed in nature to occur consistently time after time is a(an)

A tentative scientific explanation which may or may not be rejected upon further experimentation is called a

A theory is a hypothesis that has been shown to be correct by many experiments. True False

An experimental situation used as the basis of comparison is the

Equations are used to

In the equation A = πr2, π (pi) is a

Measurement information used to describe something is called data. True False

The English unit of volume closest in size to a liter is

The mass of 1000 cm3 of water is a kilogram. True False

The property of mass is a measure of how heavy an object is. True False

The property of volume is a measure of

The symbol "∆" is used to refer to an object's density. True False

When something cannot be directly observed, it can be represented by a

hich of the following is not a SI unit of the property it measures?

A 250 g ball travels at a velocity of 40 m/s. Its momentum is

A block of iron is transported to the Moon. Which of the following is true?

A boy on a skateboard pushes off the ground with his foot. He and the skateboard accelerate down the sidewalk due to the force

A cannon ball and a bowling ball were dropped at the same time from the top of a building. At the instant before the balls hit the sidewalk, the cannon ball has greater

A heavy object and a light object are dropped from rest at the same time in a vacuum. The heavier object will reach the ground

An object accelerates when it slows or its direction of movement changes. True False

Everything that happens in the universe can be traced to interactions of

From the equation w = mg, it is apparent that weight is a(an)

Gravity is an attractive force between

If an unbalanced force applied to an object doubles, then

If you consider the total distance and total time for a trip, you are calculating a(an)

If you double the mass of an object while an unbalanced force remains constant,

Ignoring air resistance, the velocity of a falling object

Imagine an experiment in which a 8 lb bowling ball and a 10 lb bowling ball are dropped from the fifth floor at the same time. The heavier ball will reach the ground first. True False

Newton's second law states that if an unbalanced force acts on an object, it will move at constant velocity. True False

Suppose that a rock is swinging in a circle when some string is let out so that the length doubled as the same speed is maintained. The force now exerted on the string is

The force of gravity near the surface of Earth is 9.8 m/s2. True False

The mass of a 100 N sack of seed is closest to

The momentum of an object remains the same unless an unbalanced force acts on it. True False

The newton is a unit of

The pound is an English unit of measure; its SI counterpart is the

The tendency of a moving object to remain in unchanging motion in the absence of an unbalanced force is called

The weight of a 50 kg box is closest to

When you roll a ball across the floor, it comes to a stop because you are no longer exerting a force on it. True False