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Which of these characteristics might help a plant species survive in an area with limited sunlight?
The leaves take in sunlight so bigger leaves would make room for more sunlight to be absorbed.
Identify voluntary muscles.
A voluntary muscle is a muscle that you choose to move, like those in the arms and legs, as opposed to the ones that move automatically, like the stomach, intestine, and heart.
Which one of the following is a change of state due to heat gain?
When solid ice gains heat, it changes state from solid ice to liquid water in a process called melting.
Match the following terms in Column-l with their answers in Column-ll.
A push or a pull is a force. A force that changes the direction of an object towards you, would be a pull. On the other hand, if it moves away, it is a push.
Chemical energy is energy stored in the bonds of atoms and molecules. The battery is an example of chemical energy.
Energy is defined as the strength or capacity required for doing a physical or mental activity.
A dam is a structure built across a stream or river to hold water back. The water in the dam is stored is standing still and isn't moving.
Which of these move by curving and straightening its body?
Snakes do not have legs. A snake moves by curving and straightening its body.
The four animals shown below are mammals. Which of them lay eggs?
Platypus lays eggs.
Some things were buried in wet ground. Several years later they were dug up. Which thing is most likely to have stayed the same?
Plastic does not decompose while others decompose in the soil. So, the plastic glass will stay the same.
What type of joint is found at elbow?
The elbow is a hinged joint made up of three bones, the humerus, ulna, and radius.
What helps to fill medicine in syringe?
The air pressure plays an important role in the filling of a syringe as the liquid medicine rushes into the syringe when the air pressure inside it decreases on pulling the piston out.
Which part of the body does the bones in vertebral column protect?
The vertebral column provides attachments to muscles, supports the trunk, protects the spinal cord and nerve roots.
Rishi wants to get salt from seawater along the seashore. How can he separate salt from the seawater?
The salt can be separated from the sea water by a simple process of evaporation.
How is the winged seed likely to be dispersed?
Some plants, like kauri and maple trees, have ‘winged’ seeds. With wind dispersal, the seeds are simply blown about and land in all kinds of places.
78% of nitrogen, 16% of oxygen and 3.5% of carbon dioxide gas in air is present at which of the following situations?
The percentage of oxygen and carbon dioxide in inhaled air is 21% and 0.04% respectively. During respiration, oxygen is used up by the cells producing carbon dioxide. The percentage of carbon dioxide in exhaled air is 4.4% and oxygen is 14-16% and nitrogen is 78%.
The person who goes into space is called
An astronaut is a person who is trained to travel in space.
Which of these cannot be recycled?
Plastics can't be recycled, so the correct option is Plastic tins.
Choose the correct sequence in the formation of rain.
Water is Vaporised to form clouds. Clouds are then condensed and rain falls.
A ripe guava on a tree fell to the ground. What force acted on guava?
Gravity is a force that tries to pull two objects toward each other. Earth's gravity is what keeps you on the ground and what causes objects to fall.
Accidents happen because of
The most common accidents happen because of the carelessness of others, our carelessness, and hurry.
Which of these is NOT a characteristic feature of aquatic animals?
Aquatic animals do not have dry skin with hair as they live in water.