Magoffin 7th Gr Science Unit 8 Review 2023

Which example of weathering includes a chemical change?

• Salt deposits in a rock dissolving during a rainstorm

• Pollutants that are dissolved in rain reacting with metals in a rock

• Rushing water in a river breaking rough edges of a rock on the riverbed

• Water freezing in a small crack in a rock that increases the size of the crack

Tags

NGSS.MS-PS1-2

What types of changes occur during the erosion and deposition of sediments in a river?

• The erosion and deposition of sediment are physical changes.

• The erosion and deposition of sediment are chemical changes.

• The erosion of sediment is a chemical change, and the deposition of sediment is a physical change.

• The erosion of sediment is a physical change, and the deposition of sediment is a chemical change.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

Human activity causes changes to the groundwater and surface water in a watershed. Which change to groundwater or surface water is classified as a chemical change?

• Concrete streets and parking lots cause more water to remain surface water instead of absorbing into the ground to become groundwater.

• Hydroelectric dams built on rivers create lakes upstream of the dams and variable flow downstream.

• Industrial waste that is dumped in a river causes acidic conditions that cause damage to fish digestive systems.

• Rainwater collects in drainage ditches and flows to nearby lakes, increasing the water volume in lakes.

Tags

NGSS.MS-PS1-2

If a large volcano that is on an island erupts, it will impact the local ecosystem. Which of the following is NOT a way the volcano will affect the local ecosystem?

• Lava will run down from the volcano, burning down all the trees around the volcano.

• The lava from the volcano will heat up the air in the local area and kill all life in the area.

• When the volcano erupts, it will throw dust into the air affecting plants across the island.

• The lava will run into the ocean around the island, killing coral reef animals.

Tags

NGSS.MS-ESS2-2

NGSS.MS-LS2-4

Most of the damage done by hurricanes is caused by —

• storm surges that flood coastal areas

• lightning from thunderstorms

• trees falling due to high winds

• windows blowing out of buildings

Which of the following describes an impact of floods on ecosystems?

• Strong winds that uproot small plants and trees

• Soil erosion along rivers that prevents plants from getting sunlight

• Homes that are destroyed and people getting injured

• Less competition for space and resources among aquatic organisms

Tags

NGSS.MS-LS2-4

A student has a bird bath made of poured concrete.

When she bought it, the salesman suggested that she seal the surface with a watertight solution.

Why was this suggestion made?

• The watertight solution would slow the evaporation of water during periods of warm weather.vv

• Over time, rainwater would react with the surface of the concrete and deposit a mineral layer over the carved areas.

• In cold, wet weather, any water that seeped into the concrete could freeze and cause the bird bath to crack.

• When rainwater sits in a concrete basin, the pH becomes too acidic for the birds. The solution allows the pH to remain neutral.

A student gathered four trays and four different kinds of rock samples —

granite, limestone, marble, and sandstone.

She tilted the trays, put a rock sample on the top end of each tray, and used a pump to force water continuously through a tube over the rocks for four days (96 hours).

She collected data and recorded observations of each rock sample at the end of each day.

The purpose of the student’s investigation is to determine —

• A  what kind of rock particles are suitable for purifying water

• how changes in the rate of water flow affect different kinds of rocks

• the effects of weathering on various environments of Texas

• the effects of pH on different kinds of rocks

A student gathered four trays and four different kinds of rock samples — granite, limestone, marble, and sandstone.

She tilted the trays, put a rock sample on the top end of each tray, and used a pump to force water continuously through a tube over the rocks for four days (96 hours).

She collected data and recorded observations of each rock sample at the end of each day.

The results of the student’s investigation will be useful for —

• a farmer choosing between contour farming or terracing to prevent erosion

• a shorefront property owner wanting to protect his property from chemical weathering

• a sculptor deciding which type of rock to use in a monument

• a golf course grounds keeper deciding what kind of turf to plant on the fairways and greens

Tags

NGSS.MS-ESS2-2

A picture of Palo Duro Canyon in the Texas Panhandle is shown above. Its formation occurred over a long period of time.

Which of the following processes most likely shaped this canyon?

• Volcanoes erupting

• Earth's plates colliding

• Glaciers forming

• Water flowing

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4