Answer:
- 1. Dimensions: The sheet can be cut into several smaller pieces.
- 2. Shape: the sheet can be formed into a paper ball or any other shape (using origami for example).
- 3. Color: You can use crayons to paint the sheet and change its color.
Explanation:
<em>Physical changes</em> do not change the chemical properties. They do not transform the compounds that form the substances. They do not break and or form chemical bonds.
When you change the form, the state (solid, liquid or gas), the color, you are just changing physical properties.
Only chemical changes change the compounds that form the substance. For instance, if you burn the <em>sheet of paper</em>, then you are causing a chemical change because the organic matter in the paper will react with oxygen forming CO₂ and water, but by cutting, folding, smashing, or coloring with crayons, the compounds in the<em> sheet of paper</em> do not change.
1. all matter is made up of tiny particles called atoms
2. atoms are neither created nor destroyed in chemical reactions
3. atoms of different elements are combined in whole number ratios and more than one ratio is possible for a given combinations of elements
4. each element it made up of different kinds of atoms , and the atoms of different elements have different masses
Answer:
B.
Explanation:
weak acids - partially dissociate to give H+
strong acids - fully dissociate to give H+
21: potassium has 20 neutrons
22: is d
Answer:
Pollination
Explanation: Involves production of male and female. Sexual reproduction is also the flowering of plants.
