Living Systems

What is the basic unit of life?

• Atom

• Molecule

• Cell

• Tissue

Tags

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Evaporation of water from the leaves of plants.

• evaporation

• infiltration

• precipitation

• transpiration

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What are the FOUR most common elements in living things?

• Carbon

• Silicon

• Nitrogen

• Hydrogen

• Oxygen

Based on this graph, what must be true about the US honeybee population?

• There are more births than deaths occurring.

• There are more deaths than births occurring.

• There is an equal number of deaths and births occurring.

• People don't like honeybees.

Tags

NGSS.MS-LS2-4

The diagram above is called a food web. It shows the relationship between foxes and voles. What does the food web show?

• foxes eat voles

• voles eat foxes

• voles compete with foxes

• foxes compete with voles

Tags

NGSS.MS-LS2-1

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Foxes eat small animals called voles. In southern Sweden, scientists observed that when the vole population decreased, what will happen the fox population?

• Population will decrease

• Population will remain stable

• Population will increase

Tags

NGSS.MS-LS2-1

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A population of bluefish lives in the Gulf of Mexico. Over the last 50 years, the size of the bluefish population has decreased. What best explains the decrease in the size of the bluefish population?

• A lot of bluefish died and no new bluefish were born.

• More bluefish were born than died.

• Fewer bluefish were born than died.

• The bluefish population is always decreasing because bluefish are always being eaten.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A population of tigers lives in Bangladesh. Over 50 years, the size of the tiger population increased. What best explains the increase in the size of the tiger population?

• A lot of tigers were born and none of them died.

• The tiger population is always increasing because no animal eats tigers.

• Fewer tigers were born than died.

• More tigers were born than died.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An ecosystem is made up of ______ .

• living things and their offspring

• nonliving things such as rocks and soil

• living things and nonliving things

• many types of animals

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What causes a population size to increase?

• The number of births is greater than the number of deaths.

• The number of deaths is greater than the number of births.

• The number of births and the number of deaths is equal.