Questions 5 to 7 are based on the following activity.
A balloon is fitted to the mouth of an empty glass bottle. The bottle is placed in water being heated in a pan. The balloon slowly gets inflated as shown in the photograph.
5. The balloon gets inflated because
(a) it gets heated and expands
(b) the air inside the bottle gets heated and expands
(c) the bottle gets heated and expands (
d) the water from the pan enters the balloon
6. What do you expect to happen if the bottle is taken out?
(a) The balloon will get deflated
(b) The bottle will break
(c) The balloon will burst
(d) None of these
7. The changes taking place in the balloon when the bottle is placed in the hot water and tak of it are (a) reversible
(b) irreversible
(c) chemical
(d) both physical and chemical E. Complete the following.
1. When you put some glucose in your mouth, your tongue feels cold because the dissolving glucose in saliva is an ...... change.
2. The slaking of​

Answer and Explanation:

First, observe and understand what is happening.

1. A balloon is on an empty glass bottle, which is placed in water that is being heated.

2. The balloon starts to become inflated, or filled with air.

5. The balloon gets inflated because:

(B) The air inside the bottle gets heated and expands.

The bottle is already filled with air (due to it being exposed before putting the balloon on it to cover the bottle). When air is heated, the molecules start to move around rapidly, coming into contact very frequently and wildly, which makes the air expand into the balloon, ultimately inflating it.

6. What do you expect if the bottle is taken out?

(A) The balloon will get deflated.

Due to the air in the bottle no longer being heated, the molecules will start to slow down, and the balloon will deflate.

7. The changes taking place in the balloon when the bottle is placed in the hot water and taken out of it are:

(A) Reversible

Although heat is used in the process, the air itself isn't changed chemically, only physically. The air can go from being at normal temperature to hot to being hot and back to normal temperature. Even if you were to freeze the air/make the air cold, the air can change back to normal temperature when heating the air.

1. When you put some glucose in your mouth, your tongue feels cold, because the dissolving of glucose in saliva is an endothermic change.

Endothermic reactions are where the reactants absorb the heat from the surrounding area to form the product. The glucose absorbs the warmth from your tongue, and as a result you feel the coldness of the glucose.

#teamtrees #PAW (Plant And Water)

I hope this helps!

did the doctor work hard to save his patients who were at deaths door (just answer i will mark as brilliant answer)​

Dead sea is located between which two countries.​

How do the two themes of the desperation of poverty and imagination as an escape from reality in “The Prince and the Pauper” interact?

（人）3（面）3不（不)3
có nghĩa là gì ạ. Mình cảm ơn <3

Which is a component of pseudoscience, but not science?

explanation
facts
process
beliefs

Menerangkan warisan seni bina rom di Malaysia​.

If kids at school are entitled to at least one recess a day, does that mean they get to have a recess?

From the above figure which one is correct

Please answer me this question fast

Stay Safe,Stay Healthy and Stay Happy ​

यदि तिमि मित्रता कथाको राजा द्रुपद भएको भए द्रोणले पुरानो प्रतिज्ञा सम्झाउदा के गर्थ्यो , उत्तर देऊ |

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what acts you can do to control air and water pollution.
its science subject

Read these sentences from the text.

The torrential rain of a hurricane often causes flooding. Almost ten inches of rain falls on North Carolina.

What does torrential mean in the sentence above?

A.
gentle

B.
heavy

C.
unexpected

D.
welcome

This question has two parts. First, answer Part A. Then, answer Part B.

Part A: What is Maddie’s first idea about how to help?

A.
Maddie wants to open an emergency shelter for lost pets.

B.
Maddie thinks about opening a lemonade stand.

C.
Maddie asks her parents for money.

D.
Maddie thinks about collecting food from her classmates.

Part B: Maddie then thinks that her first idea will not work. Which sentence best supports this conclusion?

A.
Her parents are looking to save money.

B.
She needs to convince classmates to give food.

C.
She only made $2.50 selling lemonade.

D.
Her father had his hours cut.