Question

when matter changes __, , or __.
examples:

1. breaking watermelon - changing from one big piece into ____ pieces.
2. ice cream melting - changing from one ____ of matter to another.
3. patio cracking - is an example of __ __.
4. breaking food into small pieces with your ____.

chemical change
the substances that make up an object have been __ into other __.
examples:

1. rusty car - metal and ____ react to form rust.
2. sodium metal and chlorine gas react to form ____.
3. digesting food - food is broken down by ____.

Explanation:

When matter changes, it can undergo physical or chemical changes. Physical changes involve changes in the state or form of matter without altering its chemical composition. Chemical changes involve the transformation of substances into new substances with different chemical properties.

1. Breaking Watermelon - Changing from one big piece into pieces: This is a physical change as it only changes the size and shape of the watermelon, not its chemical composition.
2. Ice Cream Melting - Changing from one state of matter to another: This is a physical change as it involves a change in the state of matter (from solid to liquid) without altering the chemical composition of the ice cream.
3. Patio cracking - This is a physical change as it only changes the structure of the patio, not its chemical composition.
4. Breaking food into small pieces with your teeth: This is a physical change as it only changes the size of the food, not its chemical composition.

Rusty car - Metal and oxygen react to form rust: This is a chemical change as it involves a reaction between metal (iron) and oxygen to form a new substance (rust - iron oxide).

Sodium metal and Chlorine gas react to form sodium chloride: This is a chemical change as it involves a reaction between sodium and chlorine to form a new substance (sodium chloride).

Digesting food - Food is broken down by enzymes: This is a chemical change as it involves the breakdown of food into smaller molecules through chemical reactions (digestion).

Answer:

1. Physical change
2. Physical change
3. Physical change
4. Physical change
5. Rusty car - Chemical change
6. Sodium metal and Chlorine gas react - Chemical change
7. Digesting food - Chemical change