Correct Answer: A. Infra-red rays

Explanation

To determine which electromagnetic wave is least energetic, we need to recall the order of electromagnetic waves in the spectrum based on their energy (or frequency).

The electromagnetic spectrum, ordered from lowest energy to highest energy, is:

1. Radio waves

2. Microwaves

3. Infra-red rays

4. Visible light

5. Ultra-violet rays

6. X-rays

7. Gamma rays

Now let's compare the given options:

• A. Infra-red rays

• B. X-rays

• C. Ultra-violet rays

• D. Gamma rays

Placing them in order of increasing energy:

1. Infra-red rays (lowest energy among the options)

2. Ultra-violet rays

3. X-rays

4. Gamma rays (highest energy among the options)

Therefore, Infra-red rays are the least energetic among the given options.

The final answer is A

Correct Answer: D. pastime/through

Correct Answer: C. deficit financing by the government.

Explanation

Demand-pull inflation is when there is an increase in aggregate demand, and the supply remains the same or decreases. Demand-pull inflation can be caused by an expanding economy, increased government spending, or overseas growth.

Correct Answer: C. leaves

Correct Answer: C. Linux

Explanation

Linux is not an application software. It is an example of system software.

Correct Answer: D) ten years

Explanation

The question is asking about how long Manahem, the son of Gadi reigned over Israel. The options are A) eight years, B) twenty years, C) six months, and D) ten years.

The correct answer is D) ten years. This means that Manahem ruled over Israel for a period of ten years.

It is important to note that Manahem was one of the kings of Israel in the Old Testament. He was known for his cruelty and his reign marked the beginning of the end for the Northern Kingdom of Israel.

In Christian Religious Knowledge, it is important to study the history of the kings of Israel and Judah as they are important figures in the Bible. By studying their reigns and actions, we can learn important lessons about leadership, obedience to God, and the consequences of sin.

To learn more about the kings of Israel and Judah, students can read the relevant sections of the Bible and other recommended textbooks.

Correct Answer: D. 76 cm at sea level

Explanation

The height of the mercury column serves as an indicator of atmospheric pressure. At sea level and at a temperature of 0

Correct Answer: D. vain

Correct Answer: A. started eating

Explanation

(a)(i) Inhalation involves the contraction of the outer muscles of the diaphragm which makes the diaphragm to pull downward and the intercostal muscles to contract to raise the ribs. The two movements increase the volume of the lungs, thereby reducing the pressure of the air inside them. This enables the air at atmospheric pressure to go into the lungs.

(b) In the shoot system of flowering plants, gaseous exchange takes place through the stomata of the leaves, the green parts and the lenticels at the bark of stem. Stoma is a hole enclosed by two guard cells which change in volume due to osmotic pressure in the guard cells. When the osmotic pressure in the guard cells is high, they become turgid and this makes the stoma to open and when the pressure is low, the guard cells become flaccid and this makes the stoma to close. Generally, exchange of gases in and out of the leaves and lenticels is controlled by the opening and closing of the stomata.

(c) Experiment to demonstrate the effect of distilled water on mammalian red blood cell:

Aim: To show that distilled water has effect on the red blood cell.

Apparatus: Beaker, distilled water, thistle funnel, ether, pig's bladder and red blood cells.

Method: The pig's bladder is dissolved in ether to make it soft and used to close or seal the stem end of the thistle funnel. Then pour the red blood cells into the thistle funnel and immerse in water inside the beaker. Mark the initial level of both solutions.

Observation and conclusion: It was observed that the level of red blood cells had risen in the thistle funnel indicating that the distilled water moved into the thistle funnel via the pig's bladder.