Answer:
Plaster cast is made up from dry muslin containing starch or dextrose and calcium sulfate.
Explanation:
It is applied to protect and is immobilize an injured bone or joint because it provides rigidity.
It is also used to help the bone and joint from reduce pain that is created during movement.
When plaster becomes wet,it reacts (Between water and calcium sulfate) and produces heat that eventually sets the plaster.It becomes hard when it dries.
The color of plaster casts are smooth and white.
Answer:
Rock
Explanation:
Minerals are inorganic substances that occur naturally in nature and have a
a definite chemical composition and a crystalline structure while rocks may consists of one or many minerals together along with some organic remains due to which it may not look shiny and crystalline from outside.
Here, the two characteristics that enable the reader to identify the object given by grandmother to Emily as rock are –
a) Looks ugly on the outside (shows the presence of organic matter)
b) solid purple color with pretty crystals (crystalline structure inside)
Answer:
Venus flytrap communicate with other organisms by secreting a sugary substance (nectar) in its leaf glands.
Explanation:
The Venus flytrap is a carnivorous plant that traps insects in a plant structure that closes when the small hairs on the inside of the structure are touched.
The leaf of this plant contains a watery fluid secreted by glands on its open traps. Organisms like flies are attracted to the secreted nectar and perches on it; only for the hairs of the flytrap to get shut due to that touch and cell expansion triggered.
