natural resource
Materials that come from the earth and can be used by living things, for example: water, oil, and minerals.
One reason that trees are an important natural resource is that their wood is used to build houses and to make paper.
O
objective lens
The lower lens in a microscope that is closest to what is being looked at.
She rotated the objective lens into position, just above the slide.
ocular lens
The upper lens or eyepiece of a microscope that the viewer looks through.
He kept both eyes open as he looked through the ocular lens.
orbit
The path that a planet or other heavenly body follows as it moves around the Sun or another heavenly body.
The moon orbits the Earth.
P
plant
A living thing is green, and needs water, light, and air to grow.
Many rain forest plants have large leaves and tall stems.
plate
1. A thin, flat piece of bone.
One dinosaur had a row of pointed plates running down its back.
2. A very large slab of rock that makes up the crust and mantle of the Earth.
The Himalayan Mountains were created when one plate collided with another plate.
pointed teeth
Sharp teeth that are good for tearing food.
Most meat-eating dinosaurs had pointed teeth.
polluted
Containing waste materials or other unwanted substances.
The river that runs through town is polluted.
pond
A small body of water.
Fish and frogs often live in a pond.
precipitation
The falling of water in the form of rain, sleet, hail, or snow.
During the last big winter storm, the precipitation took the form of snow and sleet.
BAM MARGERA alabama, alaska, arizona, arkansas, BAM MARGERA california, hollywood, miami, key west, BAM MARGERA los angeles, colorado, connecticut, delaware, cheap, discount, wholesale, directbuy, free, blog, naked, nude, news, website, search, internet, florida, georgia, hawaii, idaho, illinois, indiana, iowa, kansas, kentucky, louisiana, maine, maryland, massachusetts, michigan, minnesota, mississippi, missouri, montana, nebraska, nevada, new hampshire, new jersey, new mexico, BAM MARGERA new york, north carolina, north dakota, ohio, oklahoma, oregon, pennsylvania, rhode island, south carolina, south dakota, tennessee, texas, utah, vermont, virginia, washington, west virginia, wisconsin, wyoming BAM MARGERA, prank phone call voices, market research, flag, term insurance
