Earth and Space Science
The universe contains many billions of what?
Stars and galaxies
Electrons in an atom are located where?
Surrounding the nucleus
The process of making a reasonable guess about the outcome of an investigation based on prior knowledge is called what?
Prediction
Solution is a type of this.
Mixture
The distance that light travels in one year is known as what?
A light-year
In this model, Earth is considered to be located at the center of the universe.
Geocentric model.
Atoms are the smallest unit of what?
An element
A decrease in temperature typically affects the rate of a chemical reaction in this way.
It slows the reaction down.
Ice melting is an example of what type of change?
Physical change
This type of matter has atoms that are far apart and move randomly at high speeds.
Gas
Earth's tilted axis revolving around the sun is responsible for what?
Earth's seasons
How are elements in the periodic table organized?
They are grouped based on similarities in their properties.
A increase in temperature typically affects the rate of a chemical reaction in this way.
It speeds it up.
Density can be determined by what?
Measuring both its mass and volume
Mixing baking soda and vinegar results in production of carbon dioxide gas. What type of change in this?
Chemical change.
Ocean tides are primarily caused by this.
Gravitation attraction between the moon and the Earth.
Compounds that make up all living and nonliving things are created by that?
Atoms combining in a multitude of ways
New evidence that contradicts an existing scientific theory can result in this.
Theories being modified.
Less than 7
What is the difference between a mixture and a pure substance?
A mixture can be separated by physical means.
Planets are primarily composed of this?
Rock, ice, and gas orbiting a star.
Protons and neutrons are located in the what of the atom?
Nucleus
Why is the hypothesis valuable, even if it is not supported by the data?
It can lead to new questions and further investigations
A new substance with different properties is formed by this type of change.
Chemical change.
Define the heliocentric model.
A model in which the sun is at the center of the universe.