How would a sandblasted rock differ from a rock that hasnt been sandblasted

Remember these facts if you ever come into contact with someone who has a concussion. A concussion is an injury to the brain. The most common way to get a concussion is to hit your head. Even a simple fall could result in a concussion if a person hits his or her head on the ground. If you think someone is suffering from a concussion, the most important thing is to make sure he or she stays

. If someone passes out for more than a minute, you should

take him or her to the emergency room. Also try yelling out the person's name until he or she is able to

you.

Remember these facts if you ever come into contact with someone who has a concussion. A concussion is an injury to the brain. The most common way to get a concussion is to hit your head. Even a simple fall could result in a concussion if a person hits his or her head on the ground. If you think someone is suffering from a concussion, the most important thing is to make sure he or she stays

. If someone passes out for more than a minute, you should

take him or her to the emergency room. Also try yelling out the person's name until he or she is able to

you.

Remember these facts if you ever come into contact with someone who has a concussion. A concussion is an injury to the brain. The most common way to get a concussion is to hit your head. Even a simple fall could result in a concussion if a person hits his or her head on the ground. If you think someone is suffering from a concussion, the most important thing is to make sure he or she stays

. If someone passes out for more than a minute, you should

take him or her to the emergency room. Also try yelling out the person's name until he or she is able to

you.

Remember these facts if you ever come into contact with someone who has a concussion. A concussion is an injury to the brain. The most common way to get a concussion is to hit your head. Even a simple fall could result in a concussion if a person hits his or her head on the ground. If you think someone is suffering from a concussion, the most important thing is to make sure he or she stays

. If someone passes out for more than a minute, you should

take him or her to the emergency room. Also try yelling out the person's name until he or she is able to

you.

Remember these facts if you ever come into contact with someone who has a concussion. A concussion is an injury to the brain. The most common way to get a concussion is to hit your head. Even a simple fall could result in a concussion if a person hits his or her head on the ground. If you think someone is suffering from a concussion, the most important thing is to make sure he or she stays

. If someone passes out for more than a minute, you should

take him or her to the emergency room. Also try yelling out the person's name until he or she is able to

you.

Remember these facts if you ever come into contact with someone who has a concussion. A concussion is an injury to the brain. The most common way to get a concussion is to hit your head. Even a simple fall could result in a concussion if a person hits his or her head on the ground. If you think someone is suffering from a concussion, the most important thing is to make sure he or she stays

. If someone passes out for more than a minute, you should

take him or her to the emergency room. Also try yelling out the person's name until he or she is able to

you.

Remember these facts if you ever come into contact with someone who has a concussion. A concussion is an injury to the brain. The most common way to get a concussion is to hit your head. Even a simple fall could result in a concussion if a person hits his or her head on the ground. If you think someone is suffering from a concussion, the most important thing is to make sure he or she stays

. If someone passes out for more than a minute, you should

take him or her to the emergency room. Also try yelling out the person's name until he or she is able to

you.

Remember these facts if you ever come into contact with someone who has a concussion. A concussion is an injury to the brain. The most common way to get a concussion is to hit your head. Even a simple fall could result in

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa