Which of the following can be used by scientists to date the sediment layer they are found in? Select all that apply.

After observing a moth that is camouflaged against dark-colored bark, a scientist asks a question. The scientist discovers that the question has already been asked and answered by several investigations. What should the scientist do?

Which statement best describes the action that is creating the Rift Valley in Africa? The African plate is splitting apart to form two separate plates. The Eurasian plate is converging with the African plate.

What happened to the diasaurs?

How do you think Earth might look in 500 million years?

Neurons that carry impulses from the eyes to the spinal cord and brain are called

John wants to test how temperature affects the mass of sugar that can be dissolved in water. Which of the following factors will John expect to change in response to the differences between the control group and the experimental group? O A.

The lion's scientific name is Panthera leo. The leopard's scientific name is Panthera pardus. The tiger's is Panthera tigris. Which statement is true? A) All 3 animals share a genus. B) All 3 animals share a species.

Humans have a huge impact on ecosystems today. Talk about why we can no longer study most ecosystems that have not been touched by humans. Talk about some of the large scale issues we are causing in our environment and ecosystems today.

Why is it important to identify the presence of fecal contamination in the enviorment?

An aquifer has been compared to a sponge. Think about this analogy for a moment explain why the use of the word quotations "sponge" is more appropriate in the use of "underground river" quotes to describe aquifers.