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8th Grade Winter Benchmark

Last updated almost 2 years ago
15 questions
1

Which is the most likely weather condition that will occur at the location where the two air
masses meet?

1

Raquel thinks that the current that carries the most energy is located at the area labeled A. Is
this an accurate statement? Explain.

1

Which of the following is the correct relationship between energy, sun, and the air?

1

Which location, Florida or Alaska, gets more energy from the sun? Explain.

1

You want to live in a city in Florida where the temperatures are relatively stable. Would you
choose a coastal city or one inland, one that is away from any water body? Explain.

1

How do the currents off the coast of Florida and Alaska compare?

Below is a picture of the rock strata of a mountain.
1

What can you infer about the layers in this picture?

A group of students is developing a model that shows how geoscience processes gradually change Earth’s surface. The group comes up with the following drawing.
1

How can this model help the students explain how geoscience processes shape Earth's surface?

Examine the diagram below. At one time, these layers were found in the same area of land. Yet they have weathered very differently, with one location having more layers than the other location.
1

Explain what has happened to cause the layers in these locations to weather differently and how this provides evidence that Earth’s surface has changed over time.

The first watermelons cultivated many years ago (3000 BCE) were very different from today’s watermelons grown by farmers in many places and climates all over the world.
The data table compares how watermelons today compare to the oldest known watermelons.
1

Which of the following statements explains why modern watermelons differ from those grown in ancient times?

1

Freckles are a dominant trait. Brianna has freckles, but her husband, Emilio, does not. They calculate the chances that their children will have freckles by completing a Punnett square.

What is the probability that each child will have freckles?

Mutations are structural changes to genes that may affect proteins. Some mutations are beneficial, meaning that they help the organism. Some mutations are harmful because they reduce the organism’s ability to survive or reproduce. Other mutations neither help nor harm the organism. These are called neutral mutations
1

Which of these mutations would be considered neutral?

Below is an image of a family tree (first generation) showing a group of mice. A dark gray mouse and a white mouse had four offspring, some had white fur, while others had dark gray fur. Use the image below to help you answer the following questions.
1

Which of the following descriptions about the parents is most likely true?

One of the white offspring (from the first generation in the introductory text) mated with an unrelated white mouse. Below is a family tree (second generation) showing these parents and their offspring. The parents’ genotypes are also shown in this image.
1

Which best describes the light gray mouse’s genotype for the fur color trait?

1

Explain your reasoning.