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3 years ago

The earths core is made up mainly of what 2 substances?

Biology

1 answer:

OLga [1]3 years ago

3 0

The two substances are rock (molten and solid) and metal (solid + liquid).

Layers of the earth from the outside in:

1. crust. hard rock/dirt/ground. Shell

2. mantle. melted rock and stuff. Egg white

3. core. Outer core - liquid. Inner core- solid. Nickle and iron. Yolk

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A food chain contains oak trees (producer), mice (herbivore), black rat snakes (carnivore), and bald eagles (carnivore). How man

VMariaS [17]

Answer:

It has 4 trophic levels.

Explanation:

The first level would be the producers, followed by the primary consumers, then the secondary consumers, then the tertiary comsumers.

/ Tertiary consumers \

/ Secondary Consumers \

/ Primary Consumers \

/ Producers \

/________________________________\

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3 years ago

Which human activity creates the least threat to global stability

8_murik_8 [283]

The human activity that creates the least threat to global stability is : Reuse of Plastic bags.
Plastic bag need a lot of time to be degraded in the soil which will create a threat to the environment. Reusing plastic bag will reduce this threat.

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2 years ago

Which term describes the site of a muscle attaching to a moveable bone?

morpeh [17]

Answer:

Tendon

Explanation:

A tendon is connective tissue that connects muscle to bone.

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3 years ago

The graph shows the changing levels of hormones during menstruation and ovulation. What is the general trend for hormones after

Vladimir79 [104]

Answer:

Hormone levels generally decrease.

Explanation:

The graph showed that hormone levels after ovulation generally decrease.

The menstrual cycle of women generally have 3 phases which include:

The follicular phase
The ovulatory phase
The luteal phase

The follicular phase is characterized by low levels of oestrogen and progesterone and a slightly high level of follicle stimulating hormone which ensures that follicles within the ovary develop.

The ovulatory phase is characterized by a surge in the luitenizing hormone (which stimulates the release of eggs) and follicle stimulating hormone with a decrease in the level of oestrogen and a gradual increase in the level of progesterone.

The luteal phase is characterized by a general decrease in the levels of luitenizing hormone and follicle stimulating hormone while oestrogen level may remain high.

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2 years ago

Read 2 more answers

How does increased heat energy affect the water cycle? Helpppp

malfutka [58]

Answer:

Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle.

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2 years ago