changes in ecosystems

Which of the following would have a negative impact on an ecosystem

• constructing highways
• planting trees
• recycling paper

Tags

NGSS.MS-ESS3-3

NGSS.MS-LS2-4

6. A squirrel makes a change to its environment when it —

• climbs a tree
• digs a hole to bury an acorn
• collects acorns
• jumps from tree to tree

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NGSS.MS-LS2-4

What do scientist call organisms that are not native to an ecosystem and cause harm to native organisms?

• native plants
• invaders
• invasive species
• natural species

Which of the following activities has a positive effect on the environment?

• recycling
• deforestation
• pollution

Tags

NGSS.MS-ESS3-3

When a certain population becomes so dense that it harms or changes the quality of life in that environment, we have...

• a population
• overpopulation
• pollution

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

Which is NOT an example of a natural environmental change?

• a beaver dam
• a hurricane
• a volcanic eruption
• a housing development

Tags

NGSS.MS-ESS3-4

When animals graze so much that the vegetation is damaged, it is called

• impact

• overpopulation

• overgrazing

• fertilize

Natural disasters can also change ecosystems. What can organisms do if a disaster happens?

• Fight, Survive, Struggle
• Relocate, Adapt, Die
• Stay, Sleep, Survive
• Eat, Sleep, Repeat

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Huge areas of the Amazon Rainforest are being cut down. What effect could this have on the carbon-dioxide/oxygen cycle if the removal of so many plants and trees continues?

• Carbon dioxide levels increase

• Oxygen levels increase

• Carbon dioxide levels decrease

• Nitrogen levels decrease

How does overgrazing by herbivores change an environment?

• It causes a lot of erosion and vegetation(producers) can't grow.

• It makes the land beautiful and lush

• There is no problem when grazers eat too much grass

• The grazers add nutrients to the land