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4 years ago

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1. The creatures preserved in the Burgess Shale fossils are most closely related to modern

1 answer:

fomenos4 years ago

3 0

Answer: D. Insects

Fossils that are preserved in the Burgess Shale are mostly the remains of soft-bodied organisms.

So the answer is D because insects don’t really have bones like the rest of the other options. They have exoskeletons which protects their organs and gives them support for moving around.

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Some species are no longer living but we know they existed one time. we know this because....

Dahasolnce [82]

We know this because of the discovery of fossils and bones. We can find out roughly when they existed because of carbon dating.

6 0

3 years ago

Besides drinking water, how is water helpful for life and nature?

Contact [7]

Answer:

It keeps us alive, helps us grow plants, helps plants thrive, gives us food, helps keep our animals and crops healthy, cleans us, and so much more

Explanation:

5 0

2 years ago

Density is the ratio of a sample's mass to its volume. A bar of lead has a mass of 115.2 g. When it is submerged in 25.0 mL of w

Margarita [4]

Answer:

$10.97 \ g/cm^3$

Explanation:

Given :

Mass of a bar of lead = 115.2 g

Initial water level $\text{in the graduated cylinder}$ = 25 mL

Final water level $\text{in the graduated cylinder}$ = 35.5 mL

Difference in the water level = 35.5 - 25

= 10.5 mL

= $10.5 \ cm^3$

We know that when a body is submerged in water, it displaces its own volume of water.

Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL = $10.5 \ cm^3$

We know that mathematically, density is the ratio of mass of body to its volume.

Density of the lead bar is given by :

$\rho =\frac{\text{mass}}{\text{volume}}$

$\rho =\frac{\text{115.2 g}}{\text{10.5 cm}^3}$

= $10.97 \ g/cm^3$

3 0

3 years ago

Compared to a solution with a ph of 7, a solution with a ph of 4 is

luda_lava [24]

Answer:

pH of 7 is neutral

pH of 4 is weak acid

Explanation:

hope it helps you..

8 0

3 years ago

In the outer layer of the sun, energy is transported outward by the rising of hot plasma and sinking of cooler plasma. This tran

maks197457 [2]

Answer:

solar flares

Explanation:

6 0

3 years ago