DLA 1

Students are studying a compound that is a white crystalline powder at room temperature. The students build a ball-and-stick model of this powder. Which model demonstrates the structure of this compound?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

​

Leah determines that a chemical reaction occurred in one of her trials. Click the terms that best complete the sentence.

A chemical reaction occurred in Trial​ (a)   because substances ​​ (b)   have properties that are ​ (c)   the reactants.

• #2
• #1
• Y and Z
• W and X
• different from
• the same as

Tags

NGSS.MS-PS1-2

Identify a property of the substances Leah can use to give evidence that a chemical reaction occurred in one of her trials. Support your answer with examples from the data.

Tags

NGSS.MS-PS1-2

A chemist draws two molecular models. One model is drawn for formaldehyde (CH₂O) and one model is drawn for formic acid (CH₂O₂). A chemist forgets to write the chemical name above each model. The models are labeled as Model 1 and Model 2, as shown in the figure.

Select the terms to complete the sentences:

Formic acid is represented by Model ​ (a)   . This model has a different number of ​ (b)   atoms than the other model.

• 2
• 1
• oxygen
• carbon
• hydrogen

Tags

NGSS.MS-PS1-1

Based on the data on the resource sheet for question 5, select the word or phrases that BEST complete the statement.

The data ​ (a)   the scientists' claim because, as the demand for almonds increases, almond production in California will most likely ​​ (b)  

• support
• do not support
• increase,which will increase use of freshwater
• decrease,which decreases use of freshwater

Tags

NGSS.MS-ESS3-4

Based on information on the resource sheet and the data in the table, select the best phrase from the menus to complete each sentence.

After the new predator is added to the pond, the ​ (a)   have a better chance of surviving than fish of the other color. This is because the predator​ (b)  

• dark fish
• light fish
• cannot see them as well as the other fish.
• can move faster than this species of small fish.
• predicts where each color of fish will be.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

According to information on the data sheet and the carrying capacity graph, explain why the paramecium population growth is rapid at the part labeled A and why the population growth rate is slower at the part labeled B, where population is at carrying capacity.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Based on the information on the resource page and on the chart, which earthquake has the greatest likelihood of causing a tsunami to develop?

• Earthquake A

• Earthquake B

• Earthquake C

• Earthquake D

Tags

NGSS.MS-ESS3-2

Based on information on the resource sheet and the graph, which wave characteristics (if any) does the energy in the wave depend on?

• The amplitude only

• The wavelength only

• Both the amplitude and the wavelength

• Neither the amplitude nor the wavelength

Tags

NGSS.MS-PS4-1

The embryos of two vertebrate animals at the same stage of development are shown in the figure. Which BEST explains why the embryos are similar in appearance, yet the adults look different?

• Pigs and chickens are in the same genus

• All vertebrate embryos have the same DNA

• As embryos grow, the undergo mutations

• Some developmental processes are shared by vertebrates

Tags

NGSS.MS-LS4-2