front 1 (noun) erosion (verb) erode | back 1 When water (rain, river, ocean) slowly takes away dirt, sand, or rock. EXAMPLE: You can see evidence of erosion at the beach. Every year, the city has to bring in some new sand. |
front 2 exhaust fumes | back 2 the waste gas from a vehicle's engine (motor) EXAMPLE: Never start your car inside a garage. The exhaust fumes will make you cough, possibly get sick, and even die. |
front 3 forest | back 3 a large area of trees growing together EXAMPLE: Let's take a walk in the forest. I love having the trees all around me! |
front 4 (verb) pollute (noun) pollution | back 4 to make water, air, or soil dirty or harmful EXAMPLE: People need to stop polluting our rivers. Pretty soon they will be contaminated, and then what will we drink? |
front 5 shade | back 5 an area where there is no light from the sun EXAMPLE: I get very hot when I sit in the sunshine. I prefer to sit in the shade. |
front 6 soil | back 6 the top layer of earth that plants grow in EXAMPLE: I want to start a garden. I need to buy some organic soil to put my plants in. |
front 7 wash away | back 7 to remove with water EXAMPLE: Floods washed away much of the soil. The erosion is terrible! |
front 8 approximately | back 8 close, but not exact EXAMPLE: Our school has approximately 450 students. The number could be a little higher though. |
front 9 carbon dioxide | back 9 a gas that is produced ____ 1. when people and animals breathe out 2. when carbon is burned (for example, exhaust fumes) EXAMPLE: Carbon dioxide, CO2, is one of the gases that causes global warming. |
front 10 chop down | back 10 (phrasal verb) to cut through something to make it fall down EXAMPLE: Chopping down trees speeds up global warming for many reasons. |
front 11 crucial | back 11 extremely important or necessary EXAMPLE: Having clean air to breathe is crucial to maintain good health. |
front 12 inhale | back 12 to breathe in EXAMPLE: Breathe in and out. Inhale and exhale. |
front 13 oxygen | back 13 a gas that is in the air EXAMPLE: People and animals need to inhale oxygen. Without it, they will die. |
front 14 process | back 14 a series of actions that you take in order to achieve a result EXAMPLE: The leaves of a tree turn sunlight into energy. Without this process, a tree would not be able to grow. |
front 15 root | back 15 the part of a plant or tree that grows under the ground and gets water and food from the soil EXAMPLE: We have a huge tree in our front yard. Its roots reach deep into the soil. |
front 16 stay alive | back 16 to not die EXAMPLE: Trees need water and sunlight in order to stay alive. |
front 17 stay in place | back 17 to not move EXAMPLE: The roots of plants and trees help soil to stay in place. Otherwise, erosion would wash away the soil every time it rained. |
front 18 (verb) survive (noun) survival | back 18 to keep on living EXAMPLE: People need air, water, and food to survive. |
front 19 global warming | back 19 an increase in the temperature of the air around the world because of pollution EXAMPLE: Every day I read about global warming in the newspaper. I am very concerned (worried) about the way our Earth is changing because of the increasing temperatures. |
front 20 put someone in danger | back 20 to cause someone's life or health to be at risk EXAMPLE: Rising temperatures are causing droughts and wildfires. The lack of rain is putting people in danger! |