The clearing of forests for construction and the pollution of ecosystems are both examples of

natural ecosystem changes.

sudden climate change.

nonnative species introduction.

human habitat destruction.

A wood block has a mass of 27g. It has a length of 9 cm, a width of 3cm and a height of 1cm. What is the density of the block? (Hint, don’t forget to find the volume of the wood. Volume = LxWxH) 1 g/mL 9g/mL 1 g/cm3 9g/cm3

How do scientists know the structure of the interior of the Earth? Scientists have drilled a hole deep in the Earth to the mantle. Scientist have used telescopes to record data about the Earth's layers.

1. Some mice are light-colored, and some mice are dark-colored. Use the words DNA, trait, and mutation to explain how this happens.

The layer of the atmosphere where most of our weather occurs is called

If a pea plant has a genotype SSTt, what are the possible genetic combinations that could be present in a single grain of pollen produced by the plant?

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.