Bell Ringer

The carrying capacity of an environment may be decreased by

• maintaining biodiversity

• replacing lost minerals

• removing dead organisms

• preventing deforestation

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Rabbit populations vary in size over time. An increase in which factor would likely prevent the rabbit population from steadily increasing?

• food

• mates

• predators

• prey

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which sequence of events best represents ecological succession?

• A squirrel eats acorns, and a hawk eats the squirrel.

• Grass grows on a sand dune and is slowly replaced by shrubs.

• After many years of planting corn in the same field, minerals present in the soil are used up.

• The decomposition of plant material releases nutrients, and other plants use these nutrients.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which human activity has the potential to greatly affect the equilibrium of an ecosystem?

• cutting down a few small evergreen trees and using them to make holiday decorations

• mowing the playing fields in a city park

• washing a car with a detergent-based cleaner

• emptying an aquarium containing many nonnative fish of several species into a local lake

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Ringworm is a skin infection common among school-aged children. Although the name suggests that a worm causes the disease, it is actually caused by a fungus that lives and feeds on the dead outer layer of the skin. The relationship between ringworm and humans can be described as

• predator/prey

• predator/host

• parasite/prey

• parasite/host

Which statement describes a failure of homeostasis in humans?

• When activity in an individual increases, the body temperature rises, and the individual sweats.

• As the concentration of carbon dioxide increases in the human body, the lungs begin to expel more carbon dioxide.

• A viral infection leads to a decrease in the number of white blood cells being produced in the body.

• After an individual gets a cut, certain chemical changes begin the healing process.

Tags

NGSS.HS-LS1-3

Match the following

• animal that is killed for food

• symbiotic relationships

• removal of soil/rock by wind/water

• ancestral

• relationships that help both parties

• predator

• animal that hunts and kills

• erosion

• very old

• prey

Tags

NGSS.MS-LS2-2