I really need, help plz answer What may happen if there were no convective currents in the mantle?

Oceans will turn completely dry.
Continents will start breaking apart.
The recycling of Earth's crust will stop.
The diameter of Earth will start increasing.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole?

Pollution buildup from deposited minerals
Limestone cave collapsing due to changes in sea level
Erosion of large amounts of sand moved by ocean waves
Oxidation of rock formed by chemical weathering

How is an iron-bearing mineral rock plateau likely to change over millions of years?

Turn red due to oxidation
Turn red due to physical weathering
Smooth out its edges due to deposition
Smooth out its edges due to chemical weathering

What is the energy transformation taking place as a moving roller coaster slowly climbs a steep hill?

Potential energy to kinetic energy
Kinetic energy to potential energy
Radiant energy to chemical energy
Chemical energy to radiant energy

In which interaction is the prey harmed?

Commensalism
Competition
Mutualism
Predation

The diagram below shows an undisturbed rock.

A rock sample is shown with four layers marked A, B, C, D from top to bottom.

Which layer is likely to have the remains of an organism least similar to the organism's present-day form?

Layer A
Layer B
Layer C
Layer D

Read the given list of organisms.

deer, sheep, wolf, cattle, insects

What best describes the role of these five organisms in a food web?

Carnivores, as they all eat meat
Herbivores, as they all feed on plants
Consumers, as they all make their own food
Consumers, as they all obtain food from plants or animals

How is Earth's surface most likely to change as water freezes and expands on a mountain side over time?

Erosion will cause the ice to crack the rock.
Physical weathering will cause the ice to crack the rock.
Chemical weathering will cause the water to dissolve the rock.
Deposition will cause the water to break the rock into sediment.

The table compares wildlife supported by two plants growing around a lakeside ecosystem in South Florida.

Plant Species and Wildlife Data
Plant Species Wildlife Supported
Sawgrass Alligators, Snails
Melaleuca None

After a 25-year period, 95% of the ecosystem was covered by melaleuca. What would be the likely impact of this on the wildlife population?
Decreases, as shelter is a limiting factor
Increases, as shelter is a limiting factor
Decreases, as water is a limiting factor
Increases, as water is a limiting factor

Which of the following is an example of a fungus?

Mosquitoes
West Nile
Yeasts
Zika

Which of these is true about energy?

Can be destroyed
Cannot be created
Cannot be transformed
Can be increased in a closed system

The diagram below shows a food web in a woodland.

A food web diagram showing cornstalks with two arrows pointing away from it. One of the arrows points to the letter X and the other arrow points to a grasshopper. There are two arrows pointing away from the grasshopper. One is pointing to a baby sparrow and the other to the letter Y. There is an arrow pointing away from the baby sparrow to a snake and an arrow pointing away from the letter X to the snake.

If a certain organism is a secondary consumer, what best explains its position in the food web?

X, because organism X feeds on producers
Y, because organism Y feeds on producers
X, because organism X feeds on a carnivore
Y, because organism Y feeds on a herbivore

Which of the following is an abiotic limiting factor for a plant population in an ecosystem?

Invasive weed species
Animals pollinating flowers
Availability of soil minerals
Disease-causing fungal spores

A scientist observes debris added to a landform from a melting glacier. This is evidence for which type of natural process?

Physical weathering
Chemical Weathering
Erosion
Deposition

Which of the following could be a characteristic of the fossil that is most closely related to humans?

Arms longer than the legs
Walking on four feet
Large brain size
Tree-dwelling

Algae lives on the back of a spider crab. The crab blends with the shallow water of the ocean floor because of the greenish-brown color of the algae. The algae get a place to live and the crab gets camouflage. What is the name of the relationship that exists between the algae and the spider crab?

Commensalism
Competition
Mutualism
Parasitism

Which statement is correct about gasoline when it is burned?

Heat energy is created by the gasoline.
The total energy of the gasoline decreases.
Chemical energy in the gasoline is destroyed.
Chemical energy is transformed into heat energy.