Chemistry Basics
This subatomic particle has a negative charge.
Electron
These are the building blocks of life.
Cells
This force pulls objects toward the Earth’s center
Gravity
The planet closest to the Sun is ___
mercury
Water boils at this temperature on the Celsius scale
100 degrees
The number of protons in an atom is called its ______
atomic number
This process allows plants to convert sunlight into energy
Photosynthesis
The three states of matter are solid, liquid, and _______
Gas
This layer of Earth is made up of solid rock and lies just below the crust.
Mantle
This device is used to measure temperature.
Thermometer
When a solid turns directly into a gas without becoming liquid first, it is called this process.
Sublimation
In an ecosystem, organisms that eat plants are called this
Herbivores
The bending of light as it passes through different mediums is known as _____
Refraction
The time it takes for Earth to complete one orbit around the Sun is called a _______
365 day/ a year
This gas is the most abundant in Earth’s atmosphere.
Nitrogen
This type of chemical reaction absorbs heat energy from its surroundings.
Endothermic reaction
The process by which organisms maintain a stable internal environment is called _______.
Homeostasis
The unit of measurement for force is named after this scientist.
Newton
This is the term for molten rock that erupts from a volcano
Lava
The ability of a material to return to its original shape after being stretched is called _______
Elasticity