Question

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Answer 1

Answer:

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Answer 2

Answer:

▪️When we make tea, coffee or lemonade (nimbu paani), particles of one type of matter get into the spaces between particles of the other. This shows that there is enough space between particles of matter. Similarly, particles of sugar, salt, dettol, or potassium permanganate get evenly distributed in water.

▪️In the image is the correct answer

▪️In science, a variable is any item, factor, or condition that can be controlled or changed. There are three types of variables in scientific experiments, but we will define them later in the lesson.

First, let's discuss why scientists use experiments. An experiment is used to determine an association between different variables looking for a cause and effect relationship. A cause and effect relationship means that when you alter one or more variable(s), and measure or observe another variable while keeping everything else the same, there is an effect on the variable that you can measure or observe. This type of experiment is very important because, if there is a cause and effect relationship between variables, then outcomes are predictable and can be used to your advantage, or may be manipulated or changed. More on why this is important a little later in the lesson.