Science Test Ch.9 (5th Grade)

to examine by holding up to a bright light

• candle

• barbule

• scute

a tiny, threadlike part of a feather having tiny hooks which keep the barbs in place

• preen

• barbule

• down

to clean or straighten the feathers with the beak

• preen

• down

• barbule

a layer of small, fluffy feathers underneath the outer feathers of some birds

• down

• swimbladder

• preen

an air-filled organ inside the body of most bony fish that allows them to stay afloat; sometimes called air bladder

• swim bladder

• gill

• scute

the structure in a fish that removes dissolved oxygen from the water

• swim bladder

• gill

• scute

to shed the exoskeleton or outer layer of skin, scales, feathers, horns, or hair

• molt

• Jacobson´s organ

• scute

a special scent organ located on the roof of a snake´s mouth

• Jacobsonś organs

• gill

• scales

to squeeze

• constrict

• venomous

• metamorphosis

poisonous

• venomous

• antivenin