Final Review

When one observes the phase of matter of water, one observes a ______ property of matter. physical

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? Helium is less dense

When you heat the air inside a hot air balloon, it rises When you heat the air inside a hot air balloon, it rises. Why does this occur? Convection

Which of the following best estimates the number of galaxies in the universe? Hundreds of Billions

Which type of contact force has been applied when you hit a nail with a hammer? impact force

What tool is commonly used to help see more details about the universe? Telescope

What is the smallest particle of an element? Atom

Friction, gravity and an applied force What forces act upon a ball that is rolled across the floor? Friction, gravity and an applied force

scientific investigation observations previous research Scientific questions can be asked based on which of the following? scientific investigation observations previous research

All substances have characteristic properties All substances have characteristic properties. If one of these properties can be observed without changing the identity of the substance, it must be what kind of property? Physical

What is an example of electrical energy that is found in nature? Lightning

the types of atoms and bonds that a substance contains Chemical properties of matter depend mostly on the types of atoms and bonds that a substance contains

A car is slowed because the air it is moving through pushes against it A car is slowed because the air it is moving through pushes against it. This contact force is known as Air Resistance/Drag

Objects that are oppositely charged will do what to each other? Attract

Which contact force always acts against the direction of movement? Friction

Which physical property refers to the temperature at which a substance in a solid state transforms to a liquid state? Melting point

This is defined as a push or a pull Force

energy stored in the bonds of molecules is what kind of energy? Chemical

What are the narrow belts of fast-moving air at the higher levels of the troposphere called? Jet Streams

Which of the following best estimates the number of stars in a galaxy? Hundreds of Billions

Each day, changes take place in the atmosphere Each day, changes take place in the atmosphere. The average of these changes over a long period of time is called _______. Climate

The smallest part of a compound that still has the properties of that compound is a(n) Molecule

Density refers to a physical property that is measured using a ratio of _________ divided by _______. Mass divided by volume

Four liquids were poured on top of each other in a glass, and the liquids separated into four different layers. Which liquid had the highest density? The one on the bottom