Science STAAR Challenge

Where is most of the mass in an atom located?

• in the nucleus
• in the protons
• in the neutrons
• in the electrons

Tags

NGSS.MS-PS1-1

A partial grassland food web is shown.

Which of the following best describes a relationship in this grassland?

• Badgers are top predators because they eat upland sandpipers and beetles

• A producer-consumer relationship exists between lupines and ants

• A predator-prey relationship exists between beetles and ground squirrels

• Upland sandpipers are primary and secondary consumers because they eat grasses and grasshoppers

Tags

NGSS.MS-LS2-2

Which statement about stars is correct?

• Star formation begins in a nebula

• White dwarfs become main-sequence stars when they gain mass

• Supergiants are stars that can absorb black holes

• Main-sequence stars are formed by comets

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

The beginning of autumn in North America is in September, but the beginning of autumn in South America is in March. The diagram shows the positions of Earth, the moon, and the sun on one day in September and one day in March.

Why does autumn start in different months of the year in North America and South America?

• Earth's orbit around the sun is not a perfect circle

• North America has a larger landmass than South America

• The moon has a greater pull on South America than on North America

• Earth's axis has a 23.5 degrees tilt

Tags

NGSS.MS-ESS1-1

This drawing shows a human body system.

What is the primary function of this body system?

• The protection of vital organs from injury

• The chemical breakdown of food into smaller pieces

• The transport of nutrients, water, and oxygen to body cells

• The production of hormones that regulate growth and metabolism

How many valence electrons are in an atom of each element in Group 15 in the periodic table?

• 5

• 6

• 4

• 1

To fight a bacterial infection, a patient was given antibiotic to take for 10 days. After the patient finished taking the antibiotics as directed, almost all the bacteria were killed. After another 10 days, the patient was sick again with the same type of infection.

What most likely happened?

• A few bacteria survived the antibiotics and stopped reproducing

• The patient's high fever inactivated the antibiotic, allowing the surviving bacteria to grow rapidly

• The antibiotic slowed the life cycle of the bacteria

• Some of the bacteria were resistant to the antibiotic, and they reproduced

Tags

NGSS.MS-LS1-5

The photograph shows mountains in the Andes range in South America.

Which statement describes the geologic process that is most likely responsible for the formation of these mountains?

• They are along a transform plate boundary that is no longer active, so erosion is creating deep valleys

• They are along a transform plate boundary in which plates are currently moving side by side, causing earthquakes and faults

• They are along a plate boundary in which plates are currently converging, causing uplift and steep slopes

• They are along a plate boundary in which plates diverged in the distant past, allowing new rock to build up.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

Tags

NGSS.MS-PS1-1

The positively charged particles of an atom are the ________.

• electrons
• protons
• neutrons
• protons & neutrons

Tags

NGSS.MS-PS1-1