Max tried an experiment in which he added red-dyed salt water to clear freshwater. He noticed that a lot of the red water sank below the clear water. Which of the following statements explains why this happened? Adding salt to water makes it more dense.
Adding salt to water makes it less dense.
Adding salt to water decreases its temperature.
Adding salt to water increases its temperature.

Describe the function of the endomembrane system? what organelles are involved?

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

What is any method of measuring the age of an object or event in years, such as using atomic half-life?