Your answer would be C as a physical change is characterized as a change in physical appearance be it shape, phase, or size. A good example is an ice cube when it melts, it may look different but its chemical composition is the same and the change from is ice to water is reversible unlike a chemical change like baking a cake which cannot be reversed to its original state before it went into the oven. Hope this helps!
Answer: Our oceans cover more than 70 per cent of the Earth's surface.
The majority of life on Earth is aquatic.
Less than five per cent of the planet's oceans have been explored.
The world's longest mountain chain is underwater.
There are more historic artefacts under the sea than in all of the world's museums.
Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Doing personal interviews with holiday shoppers at an indoor mall is an example of D. PRIMARY research.
A primary research is any type of research wherein the researcher personally goes out and collects data. The researcher can personally conduct surveys, interviews, observations, and ethnographic research. Results from these activities are gathered primarily by the researcher.
C because that is showing potassium. A B C and D aren’t
