Glass is a hard substance that consists of sand, soda ash and limestone. When these substances are heated together, their molecules bond to form the substance we know as glass. We use glass for many purposes, and glass bottles have become a popular method of storage, as well as being used in chemical experiments.
<em>Answer:</em>
<em>A</em>
<em>Explanation:</em>
<em>The explanation lies in the answer. Plants need all components to make their own food.</em>
Answer
Used up faster than they are able to be replaced
Explanation:
The word renewable itself mean non-depletable or naturally replenish able. They cause little to no environmental impact that it can be used for long term. They are available in plenty and cannot be used up in quick time. Hence option a is correct. Rest all are correct about characteristic of a renewable resource
Answer:
5.168 L
Explanation:
Applying Charles Law,
V/T = V'/T'..................... Equation 1
Where V = Initial Volume, T = Initial Temperature in Kelvin, V' = Final Volume, T' = Final Temperature in Kelvin,
Make V' the subject of the equation,
V' = VT'/T................. Equation 2
From the question,
Given: V = 5L, T = 25°C = (25+273) = 298K, T' = 35°C = (35+273) = 308K
Substitute these values into equation 2
V' = (5×308)/298
V' = 5.168 L
Answer:
- salt dissolved in water
- air in the lower levels of the Earth’s atmosphere
- leather made from cow hides
- metal after if has been molded
Explanation:
Matter is defined as material of substance which has mass and occupy physical space. Matter is some thing which contains atoms.So, from the given options the examples of matter are:
- Salt dissolved in water: salt is made up sodium and chloride where as water is made of hydrogen and oxygen
- air in the lower levels of the Earth’s atmosphere: air mixture of gases and gases are made atoms of different elements.
- leather made from cow hides: processed product from the animal skin which is also made of organic matter that is carbon , hydrogen , oxygen and nitrogen.
- metal after if has been molded; they too are made up of atoms.
