Humans and other organisms have senses that help them detect internal and external cues. Biochemistry 3.3.8 explain that animals need air, water and food and that plants need air, water, nutrients, and light to survive. All animals depend on plants. Some animals eat plants for food. Other animals eat animals that eat the plants.
Organisms have basic needs.
Those properties can be measured using tools, such as rulers, balances, and thermometers. Objects can be described by the properties of the materials from which they are made. Things can be done to materials to change some of their properties. Properties can be used to separate or sort a group of objects or materials. Heat can be produced in many ways, such as burning, rubbing, or mixing one substance with another.