Ecosystems-Unit 1: Levings

The use of evidence to say why one idea is the best.

• argument

• claim

• data

• evidence

Tags

NGSS.MS-LS2-4

A proposed answer to a question; to declare or state an answer.

• answer

• argument

• claim

• data

Tags

NGSS.MS-LS1-3

Information, observations or measurements recorded in an investigation.

• argument

• answer

• claim

• data

Tags

NGSS.MS-LS1-5

Information(facts or proof) that supports an answer to a question.

• energy

• environment

• evidence

• matter

A living thing, such as a plant or an animal.

• organism

• animal

• matter

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

A model that shows the flow of energy from one feeding level to the next in an ecosystem.

• food chain

• energy pyramid

• food web

Tags

NGSS.MS-LS2-3

Energy enters most ecosystems as ______.

• moving air

• water

• sunlight

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In his experiment, Jan van Helmont concluded that

• trees grow better in wet soil than dry soil

• trees do not get the matter they use for growth from soil.

• trees convert matter from carbon dioxide into soil.

Tags

NGSS.MS-LS1-5

The burning of fossil fuels has led to a build-up of carbon dioxide in Earth’s atmosphere and a rise in global temperatures. Scientists refer to this phenomenon as global warming or climate change.

Many scientists wonder about the effects of climate change on Earth’s ecosystems. For example, how might an increase in carbon dioxide in the atmosphere affect plant growth? To find out, they did an experiment.

First, the scientists marked out several plots of trees. Within each plot, they placed a ring of vent pipes. The pipes in half of the rings released air with normal amounts of carbon dioxide. The pipes in the other half of the rings released air with more carbon dioxide.

Later, the scientists compared the growth of trees in each type of plot. What did the data show?

• Trees in the plots with increased carbon dioxide grew much more than trees in the other plots.

• Trees in the plots with increased carbon dioxide grew less than trees in other plots.

• There was no difference.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

When an animal dies, the once-living matter from the animal's body

• remains exactly the same for millions of years.

• is broken down and passes into the soil and air.

• disintegrates into small particles that eventually disappear.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4