Answer:
The right answer is D: realize that the term heavy describes an object one way and the term big describes it another way.
Explanation:
The studies of Piaget suggested that when a child is born, his brain if of a very basic kind of structure. He did not agree with the idea that intelligence is a pre-determined trait and in contrast he said that during the process of child's growth and development, when the interaction with environment occurs, his cognitive abilities also grow.
When the child is able to realize that term heavy describes an object one way and the term big describes it another way, that is the point when , children have acquired the cognitive skill of conservation.
Hope it help!
<span>Q1. Diamond, Q2. Diamond, Q3. The amount of light bending depends on angle and wavelength the light enters the substance and how dense the substance is, Q4. If the second substance is more dense than the first, the light ray bends towards the ‘normal’, if it’s less dense it bends away, Q5. In the swimming pool, when you look at a person’s body underwater they appear disjointed.</span>
Explanation:
The chemicals are contaminant in the ground water system and they can inflict serious health hazards on humans when water is sourced from such polluted ground water system.
- Consuming contaminated water can lead to cholera and diarrhea.
- It makes ground water toxic and poisonous.
- Drinking contaminated ground water can lead to the introduction of heavy metals in the body.
- Chemical wastes containing radioactive materials can damage body tissues.
- They render ground water unsafe for drinking ans usage.
Learn more:
Air pollution brainly.com/question/10743354
#learnwithBrainly
Answer:
they have thin membranes to allow diffusion of substance for short distance
they are numerous to increase the surface area of absorption
hope this helps