She got some water to test.
Her favorite animals are cats.
She wants to make the water clean and safe for animals.
Polluted water is harmful to animals.
A lake can be filled with water from a river.
The scientist ate a sandwich for lunch.
She put the water in a jar.
A scientist walked to the river.
The scientist left the river.
Some evergreen trees have cones.
Some trees stay green all the tine.
An acorn is an oak tree's seed.
Evergreen trees are always green.
A tree's trunk grows one ring each year.
When the cones dry, seeds pop up.
Rat and raven
Rabbit and raccoon
Radio and ram
To run all the parts of the train except the engine
To wait on people who ride the train
To keep the engine and cars working