Plants
The part of a plant that holds the plant in the ground and takes in water and minerals from the soil.
roots
An animal that lives its whole life in water and breathes with gills.
fish
A solid made of minerals.
rock
The measure of how hot or cold something is.
temperature
The path electricity follows from a battery through a bulb and back to the battery.
circuit
The first stage in the growth of many plants.
seed
To enter a deep sleep in which life activities slow down.
hibernation
The solid outside layer of the Earth.
crust
The water that falls to the earth as rain, snow, sleet or hail.
precipitation
The force between two moving objects that makes it hard for the objects to move.
friction
Another name for a young plant.
seedling
This word describes a species that is gone forever because all of its kind have died.
extinct
A rock that has been changed by heat and pressure.
metamorphic rock
The movement of air.
wind
A material in which thermal energy moves easily.
conductor
The food making process of plants.
photosynthesis
The living and non-living things in an environment.
ecosystem
The middle layer of the earth.
mantle
A map that shows weather data for a large area.
weather map
A material in which thermal energy does not move easily.
insulator
The green substance that uses water, air, and light to make food for plants.
chlorophyll
A group of the same kind of living things that all live in one place at the same time.
population
The process by which rock is worn down and broken apart.
erosion
An instrument that measures temperature.
thermometer
The movement of thermal energy without any objects touching or moving.
radiation