TEKS Science

When Macy returned to her classroom after lunch, the following items were on her desk. What should she do first?

• Read the lab instructions

• Wash all the glassware

• Measure the temperature of the water

• Wait for the teacher instructions

Tags

NGSS.MS-PS3-4

Mr. Line fills a bottle half-full of vinegar. He places baking soda in a paper napkin tied to a rubber stopper. When he shakes the bottle, the vinegar reacts with the baking soda producing bubbles. When the bubbles fill the bottle, the stopper is forced off the top.

Why does this happen?

• The gas created in the reaction takes up more room than the space in the bottle.

• The temperature of the bottle changes which makes the stopper become too loose.

• The string, napkin, and stopper make the reaction happen too fast.

• There is too much vinegar left in the bottle.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A class of third-grade students was trying to identify some unknown minerals. They tested each mineral to determine its hardness on a scale from 1 to 10. The data they collected is shown above.

The class wants to separate the minerals into three groups based on their hardness. Which chart accurately shows the data the class collected?

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Mrs. Brown was completing an inventory of the science supplies available to her students. Which column includes safety equipment?

• Column A

• Column B

• Column C

• Column D

Students make the model of a hill shown above using bricks, a baking pan, some sand, some pebbles, and some clumps of grass. They plan to learn about erosion by adding water to the top of the pan. Which procedure would BEST help students learn how erosion affects sizes of hills differently

• Use the same amount of the water in each trial and change the type of sand in the pan.

• Use a different amount of water in each trial and keep the same type of sand in the pan

• Use the same amount of water in each trial and change the number of bricks under the pan.

• Use a different amount of water in each trial and keep the same number of bricks under the pan.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

What is the weight of the washer?

• 2.0 N

• 2.2 N

• 2.6 N

• 3.4 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A student is trying to determine what type of metal something is by sprinkling some of its filings into a bunsen burner’s flame. The flame changes color depending on what type of metal it is. Which of the following pieces of safety equipment would be the least vital to conduct this test?

• Protective Eye Goggles

• Rubber Gloves

• Protective Apron

• Heat Resistant Gloves

A student finishes an experiment and has leftover chemicals. How should the student get rid of the leftover materials?

• Pour the leftover material down the drain

• Dispose of the leftover material in the trash can

• Wait for teacher directions

• Put the materials back in the original container

Some students want to study the shapes of crystals in a mineral. Which piece of equipment will they need?

• balance

• hand lens

• hot plate

• thermometer

Two students went to visit a blood drive. The students waited outside and asked donors if they would be willing to share information about their blood type and Rh type. The donor responses are shown in the tables.

Based on these results, students should conclude that the most frequently donated type of blood at the blood drive was:

• A+

• AB-

• B+

• O+