Answer: gas and alkaline earth metal
Explanation:
She must have used the torch as Sun, the tennis ball as Earth and the marble as Moon.
Measuring density is very important for many different industries because the density measurement will help determine the characteristics of a material, for example, whether the material will float or sink. Knowing the density of a material helps in determining the mass and volume of a material, all of which are extremely important measurements in all industries.
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The Sun, Earth, and the Moon form a night angle.
Explanation:
