Respan Dataset Explorer

Which sentence from the article best supports the answer to Part A?
*
3 points
“She noticed many small black bumps on the animal’s face, especially along the jaws.” (paragraph 3)
“When a bird, mammal, or fish passes by, the reptile turns and snaps its huge jaws.” (paragraph 6)
“After the eggs hatched, she set up experiments to find out what type of sensors the black bumps were.” (paragraph 8)
“The reptile snapped at the water drop!” (paragraph 17)

The sentence from the article that best supports the answer to Part A is: **“She noticed many small black bumps on the animal’s face, especially along the jaws.” (paragraph 3)**

This sentence directly references the black bumps and specifies their location, which aligns with the focus on the size and pattern of the bumps on an alligator’s jaw, thereby supporting the intended information tied to the photograph.

 What is the meaning of sensor as it is used in paragraph 9 of the article?  
*
3 points
a collection of nerves that sends signals to other animals
a device that detects changes in the body
a specialized body part that detects conditions outside of the body
a large black bump that aids in hunting

The meaning of "sensor" as it is used in paragraph 9 of the article is: **a specialized body part that detects conditions outside of the body.**

In biological contexts, "sensors" typically refer to components or structures that allow an organism to perceive environmental stimuli, which aligns with the idea of a specialized body part designed for detection.

 What is the meaning of sensor as it is used in paragraph 9 of the article?  
*
3 points
a collection of nerves that sends signals to other animals
a device that detects changes in the body
a specialized body part that detects conditions outside of the body
a large black bump that aids in hunting

The meaning of "sensor" as it is used in paragraph 9 of the article is: **a specialized body part that detects conditions outside of the body.**

This interpretation aligns with the context of discussing how certain features or structures in animals serve the purpose of detecting environmental stimuli.

How do the alligators’ sensors function according to the article?  
*
3 points
They detect the depth of the water.
They help the alligator swim straight.
They help the alligator see in the dark.
They detect changes in water.

According to the article, the alligators’ sensors function by: **They detect changes in water.**

These sensors, specifically the black bumps on the alligators, are described as being able to perceive vibrations and movements in the water, which helps the alligator detect prey and other stimuli in its environment.

 Which statement best summarizes the process Dr. Soares follows in her laboratory experiment?  
*
3 points
She began with an idea and conducted experiments until she found data that supported her idea.
She began with a test subject and conducted experiments until she discovered a special ability.
She began with a question and conducted experiments until she discovered evidence that provided an answer.
She began with data that offered an explanation and conducted experiments until she confirmed the data.

The statement that best summarizes the process Dr. Soares follows in her laboratory experiment is: **She began with a question and conducted experiments until she discovered evidence that provided an answer.**

This statement effectively captures the scientific method used in her research, which typically starts with a question or hypothesis and involves experimentation to find answers.

Which two paragraphs from the article best support the answer to Part A?
*
4 points
paragraphs 4 and 9
paragraphs 5 and 14
paragraphs 6 and 17
paragraphs 3 and 15

The two paragraphs from the article that best support the answer to Part A are: **paragraphs 4 and 9.**

Paragraph 4 likely outlines Dr. Soares's initial inquiry or question regarding the alligator's sensors, while paragraph 9 would provide insight into her experimentation and findings related to those sensors, aligning well with the concept of starting with a question and conducting experiments to find evidence.

Multiply.
You may use the models shown to help find the product.
 
\[= 0.4 \times 2\]
Two squares of equal size. Each square is divided into 10 equally-sized columns to show tenths. In the first square, 4 columns are shaded and 6 columns are not shaded.
In the second square, 4 columns are shaded and 6 columns are not shaded.

To multiply \(0.4 \times 2\), you can think of \(0.4\) as four tenths. 

1. **Understanding \(0.4\)**: In the first square, since it is divided into 10 columns and 4 columns are shaded, this represents \(0.4\) or \( \frac{4}{10} \).

2. **Multiplying by 2**: When we multiply \(0.4\) by \(2\), we are essentially doubling the shaded area in the first square.

    \[
    0.4 \times 2 = 0.8
    \]

This means in terms of tenths, \(0.8\) would be represented by shading 8 out of the 10 columns.

3. **Visual Representation**: If you visualize a second square filled the same way as the first, since you're duplicating the shaded area, in the final result (which represents \(0.8\)), 8 columns would be shaded.

So, the product of \(0.4 \times 2\) is:

\[
\boxed{0.8}
\]

It seems you didn't add any content to your last message. If you have any further questions or need additional assistance, feel free to ask!

Multiply.
Hint: Use the number line to imagine moving 
\[0.5\] two times.
 
\[= 0.5\times 2\]
A number line running from 0 to 1, with each tenth unit shown with a tick mark. An arrow jumps right 2 times along the number line starting at 0 and stopping at 0.5, and tenth tick mark after 0.

To multiply \(0.5\) by \(2\), you can visualize moving along the number line starting from \(0\).

1. **Starting Point**: You begin at \(0\).

2. **First Jump**: When you move right \(0.5\) (which is also \(\frac{1}{2}\)), you land at \(0.5\).

3. **Second Jump**: Moving another \(0.5\) from \(0.5\) will take you to \(1.0\).

Since you've moved right \(0.5\) two times, the result of \(0.5 \times 2\) is:

\[
0.5 \times 2 = 1.0
\]

Therefore, the product is:

\[
\boxed{1.0}
\]

What expression can we represent with the following number line?
A number line labeled 0 to 4, with each tenth unit shown with a tick mark. An arrow jumps right 5 times along the number line starting at 0 and stopping at 0.7, 1.4, 2.1, 2.8, and ending at a point at 3.5.
\[0.7\]
\[0\]
\[1\]
\[2\]
\[3\]
\[4\]
Choose 1 answer:
Choose 1 answer:
(Choice A)   
\[5 \times 0.7\]
A
\[5 \times 0.7\]
(Choice B)   
\[7\times 5\]
B
\[7\times 5\]
(Choice C)   
\[7\times 3\]
C
\[7\times 3\]

To analyze the number line described, we start at \(0\) and make \(5\) jumps of \(0.7\):

1. **First Jump**: \(0 + 0.7 = 0.7\)
2. **Second Jump**: \(0.7 + 0.7 = 1.4\)
3. **Third Jump**: \(1.4 + 0.7 = 2.1\)
4. **Fourth Jump**: \(2.1 + 0.7 = 2.8\)
5. **Fifth Jump**: \(2.8 + 0.7 = 3.5\)

Each jump represents adding \(0.7\). Since you have jumped \(5\) times, the total can be expressed as:

\[
5 \times 0.7
\]

Thus, the correct choice that represents this expression is:

**(Choice A)**   
\[5 \times 0.7\]