Table of Contents
What fire is made of?
Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire’s intensity will be different.
What matter means in science?
Matter is the “stuff” that makes up the universe — everything that takes up space and has mass is matter. All matter is made up of atoms, which are in turn made up of protons, neutrons and electrons. Both atoms and molecules are held together by a form of potential energy called chemical energy.
Are atoms made of elements?
Because like all things in the world, elements and molecules are both made of atoms. You know elements are all the different types of atoms on the periodic table. Molecules are what you get when those atoms are combined. For example, water is a molecule made of hydrogen and oxygen.
What is matter in science grade 8?
Matter is anything that has mass and takes up space.
Is the sun made of fire?
The Sun isn’t “made of fire”. It’s made mostly of hydrogen and helium. Its heat and light come from nuclear fusion, a very different process that doesn’t require oxygen. Ordinary fire is a chemical reaction; fusion merges hydrogen nuclei into helium, and produces much more energy.
Is Fire man made?
Fires may be natural or man-made, depending on what originally caused the disaster. Lightning may cause a natural fire, but leaked gas or faulty mechanical equipment is considered a man-made cause.
Who made gold?
The first gold coins were minted under the order of King Croesus of Lydia (a region of present-day Turkey) in about 560 BC. Gold coins were commonly used in transactions up through the early 1900s when paper currency became a more common form of exchange.
Why are silver atoms bigger than copper atoms?
QUESTIONS: Why are the silver atoms bigger than the copper atoms in the previous diagrams? Hint: Find the two elements on the Periodic Table and compare their positions. Silver lies below copper on the Periodic Table, which means the atoms of silver are bigger than those of copper.
What are the properties of matter Class 8?
State of Matter
- All matter exists in one of the three states. The three states are – solids, liquids and gases.
- The three states are classified on the basis of differences in physical properties namely: Mass. Volume. Shape. Rigidity. Density.
- The kinetic theory of matter states that all matter is composed of particles.
Can the sun explode?
And yet, our Sun has a lifetime, just like any other star. It will one day run out of fuel too, and eventually ‘die’. The Sun, however, is too small to go supernova. Instead, our star will one day become a red giant star, extending in size so much that its surface will be where the Earth is in its present orbit today.