class vi science 2

10 FILL IN THE BLANKS

The two properties that are possessed by all materials are mass and volume.
Materials that typically have shiny surfaces are said to have a lustrous appearance.
Anything that occupies space and has mass is called matter.
Materials which can be compressed or scratched easily are termed soft, while those difficult to compress or scratch are hard.
The space occupied by matter is its volume.
The materials, through which things can be seen clearly, are called transparent.
Materials like wood, cardboard, and metals are examples of opaque materials.
Materials that completely disappear when mixed in water are described as soluble.
The units used to measure mass are gram (g) and kilogram (kg).
Oxygen gas is important for the survival of animals and plants that live in water because it dissolves in water.

05 COMPETENCY BASED QUESTIONS WITH ANSWERS

Why would using paper-like materials to construct cooking utensils be a poor idea, based on material properties?

Paper-like materials would be unsuitable for cooking utensils because the materials chosen to make an object must depend on its properties and the purpose for which it is used. Cooking utensils must withstand heat and not burn or dissolve, properties that paper typically lacks.
Ghulan hides behind a wall, Sheeta hides behind a tree, and Sara hides behind a frosted glass door during a game. Whose hiding place is the most effective for remaining completely unseen, and why?

Ghulan’s hiding spot behind the wall is the most effective. The wall is made of an opaque material. Sara’s spot is translucent, while the tree is also opaque.
An investigator needs to sort various substances. Which two would behave similarly in water?

Sugar and salt behave similarly because they are soluble.
Which material is soft and which is hard: rubber or iron?

Iron is hard as it is difficult to compress. Rubber is comparatively soft.
Bags occupying seats prevent students from sitting. What property of matter is shown?

Bags occupy space, which refers to volume. Anything occupying space and having mass is matter.

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